CHAPTER 3: THE STUDY OF ROCKS

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "CHAPTER 3: THE STUDY OF ROCKS"

Transcription

1 CHAPTER 3: THE STUDY OF ROCKS

2 INTRODUCTION Rock is defined as a mixtures formed of aggregates of one or more minerals (aggregate of minerals). Rocks can be formed by many different processes such as: (1) Igneous - Crystallization of a melts magma (intrusive) and lava (extrusive) (2) Sedimentary - Solidifying sediments like sand or clay (3) Metamorphic - Re-crystallizing previously formed rocks in the solid state (4) Hydrothermal - Some are formed by crystallization from hot aqueous fluids

3 Cont d Civil engineers have to deal with rock and soils during various stages in the process of construction, build a road, a tunnel, a slope or a dam. From the stage of planning to the execution of a construction project, the engineer must have a basic appreciation of the engineering behavior of rocks and soils under various conditions. It becomes imperative for engineers to have some basic geological appreciation of rocks and soils in order to understand the engineering limits to which these materials can be subjected to Suitable background to the further study of soil mechanics and foundation engineering.

4 CHAPTER 3.1: IGNEOUS ROCKS

5 IGNEOUS ROCKS Defined as rocks which are normally crystalline in nature having solidified from an original molten state or magma that exists for long period of time beneath the surface of earth. Igneous rocks can be derived from the cooling of molten magma or of lava from volcanic eruption. Frequently regarded as the parent material because they are the first product to be formed from the cooling of magma. MAGMA is molten rock material generated in the certain zones deep inside the earth's crust and possible in the upper zones of the mantle. Magma moves from deeper zones to higher zones of the crust through forceful injections into fractures and faults in the adjacent rocks.

6 Igneous Rock

7 What Is Magma? Magma is hot molten mobile rock. Igneous rocks form when magma cools and solidifies. Magmas come out of active volcanoes as lavas. The most abundant magma is a melt of silicate composition and this can carry suspended crystals and gases which bubble out in air. It is a mixture of liquid rock, crystals, and gas. Magmas are less dense than surrounding rocks, and will therefore move upward. If magma makes it to the surface it will erupt and later crystallize to form an extrusive or volcanic rock. If it crystallizes before it reaches the surface it will form an igneous rock at depth called a plutonic or intrusive igneous rock.

8 Eruption of Magma When magmas reach the surface of the Earth they erupt from a vent and it may erupt explosively or non-explosively. Non-explosive eruptions are favored by low gas content and low viscosity magmas (basaltic to andesitic magmas). Usually begin with fire fountains due to release of dissolved gases. Produce lava flows on surface. Produce Pillow lavas if erupted beneath water.

9 Cont d Explosive eruptions are favored by high gas content and high viscosity (andesitic to rhyolitic magmas). Expansion of gas bubbles is resisted by high viscosity of magma - results in building of pressure. High pressure in gas bubbles causes the bubbles to burst when reaching the low pressure at the Earth's surface. Bursting of bubbles fragments the magma into pyroclasts and tephra (ash). Cloud of gas and tephra rises above volcano to produce an eruption column that can rise up to 45 km into the atmosphere.

10 Tephra that falls from the eruption column produces a tephra fall deposit

11 If eruption column collapses, a pyroclastic flow may occur, wherein gas and tephra rush down the flanks of the volcano at high speed. This is the most dangerous type of volcanic eruption. The deposits that are produced are called ignimbrites

12 Grain size Three types of rock can be identified based on predominant grain size that reflects the depth at which molten rocks form within the Earth: a) Volcanic rocks (extrusive) solidify close to the Earth's surface. Because cool quickly they have a finer-grained matrix called groundmass. They may contain some larger crystals that formed earlier further down called phenocrysts. b) Plutonic rocks (intrusive) form deeper within the Earth and the slower cooling allows them to crystallize as coarse-grained rocks. c) Hypabyssal or sub volcanic rocks form at intermediate depths generally as dykes and sills and so tend to be medium-grained.

13 Classification of Igneous Rocks There are various ways of classifying igneous rocks. The most significant are (1) Mineralogical and chemical composition and (2) Rock texture (geological environment). Igneous rocks are either formed as Intrusive or Extrusive Rocks.

14 Types of Igneous Rocks Scientists have divided igneous rocks into two broad categories based on where the molten rock solidified. Volcanic or extrusive igneous rocks form when the magma cools and crystallizes on the surface of the Earth. Plutonic or Intrusive igneous rocks where in the magma crystallizes at depth in the Earth.

15 Intrusive and extrusive igneous rock bodies

16 Minerals of igneous rocks To correctly classify many igneous rocks it is first necessary to identify the constituent minerals that make up the rock. Piece of cake you say, I saw most of these minerals when I did the Minerals Exercise or I have them in my mineral collection. Well, its not quite that easy. The mineral grains in rocks often look a bit different than the larger mineral specimens you see in lab or museum collections. The following section is meant to assist you in recognizing common rockforming minerals in igneous rocks. Refer back to it often as you attempt to classify your rock specimens.

17 Plagioclase Plagioclase is the most common mineral in igneous rocks. The illustration given shows a large chalky white grain of plagioclase. The chalky appearance is a result of weathering of plagioclase to clay and this can often be used to aid in identification. Most plagioclase appears frosty white to gray-white in igneous rocks, but in gabbro it can be dark gray to blue-gray. If you examine plagioclase with a hand lens or binocular microscope you can often see the stair-step like cleavage and possibly striations (parallel grooves) on some cleavage faces. Some potassium feldspar is white like plagioclase, but is usually a safe bet to identify any frosty white grains in igneous rocks as plagioclase. Expect to find plagioclase in most phaneritic igneous rocks and often as phenocryts in aphanitic rocks.

18

19 Quartz Quartz is also a very common mineral in some igneous rocks. It can be difficult to recognize since it doesn't look like the beautiful, clear hexagonal-shaped mineral we see in mineral collections or for sale in rock shops. In igneous rocks it is often medium to dark gray and has a rather amorphous shape. If look it with a hand lens you will notice the glassy appearance and lack of any smooth cleavage surfaces. You will also find quartz grains resist scratching with a nail or pocket knife, you can expect to find abundant quartz in granite and as phenocryts in the volcanic rock rhyolite. In some other common igneous rocks you may find a few scattered grains of quartz, but it is often conspicuous by its absence. Once recognized, quartz is rarely confused with any other common rock-forming mineral.

20

21 Potassium Feldspar Think pink is the motto for potassium feldspar. The image given shows several large grains of the potassium feldspar, orthoclase; note the pinkish cast. As orthoclase is a feldspar, you should also see the stair-step cleavage characteristic of feldspars. Unfortunately, all potassium feldspar is not pink, microcline is usually white. How does one distinguish white potassium feldspar from plagioclase? The answer is that in hand samples it is nearly impossible. Sometimes striations on cleavage faces allow you to differentiate the two. Plagioclase has striations, potassium feldspar does not. But in most cases any white feldspar is identified as plagioclase and any pink feldspar as orthoclase. Expect to find orthoclase as a common constituent of granite and matrix material in rhyolite. In the latter rock the orthoclase is too fine-grained to be seen even with a binocular microscope, but its presence gives most rhyolites a distinct pinkish cast.

22

23 Muscovite Muscovite is not a common mineral in igneous rocks, but rather an accessory that occurs in small amounts. It is shiny and silvery, but oxidizes to look almost golden. In fact, more prospectors probably confused muscovite in their pans for gold than they did pyrite (fool's gold). Muscovite has excellent cleavage and will scratch easily. If you suspect muscovite is present, try taking a nail to it. It should flake off the rock. Muscovite occurs in some granite and occasionally in diorite. Unlike, its close cousin, biotite, it rarely occurs as phenocrysts in volcanic rocks.

24

25 Biotite Biotite occurs in small amounts in many igneous rocks. It is black, shiny and often occurs in small hexagonal (6-sided) books. It is often confused with amphibole and pyroxene. Like muscovite, it is soft and has good cleavage. Try scratching the black grains with a nail or knife. Biotite will flake off easily. Biotite is differentiated from amphibole by shape of the crystals (hexagonal for biotite and elongated or needle-like for amphibole) and by hardness (biotite is soft, amphibole is hard). It is differentiated from pyroxene by hardness, color (biotite is black and pyroxene dark green) and occurrence (biotite is found in light-colored igneous rocks like granites, diorites and rhyolites while pyroxene occurs in dark-colored rocks like gabbro and basalt). Expect to find biotite as a common accessory in granite, and as phenocrysts in some rhyolites.

26

27 Amphibole Amphibole is a rather common mineral in all igneous rocks, however, it is only abundant in the intermediate igneous rocks. Occurs as slender needle-like crystals. It has good cleavage in 2 directions and hence has a stair-step appearance under a binocular microscope. It is often confused with biotite and pyroxene. Biotite is softer and the needle-like crystals differentiate it from pyroxene. One caution, most students believe that all amphibole crystals must have the pencil-like appearance. Remember the orientation of grains in an igneous rock is random. What would your pencil look like if you looked at it down the eraser? Not all grains of amphibole will be oriented so you can see the elongation of the crystals. It s a good guess that if you see a few crystals that have the "classic" amphibole shape, the other black grains are also amphibole. Biotite and amphibole do occur together in igneous rocks, but the association is not all that common. Amphibole is very common in diorite, less so in granite or gabbro. It also is a common and diagnostic phenocryst in andesite.

28

29 Pyroxene Pyroxene is common only in mafic igneous rocks. Occurs as short, stubby, dark green crystals. It has poor cleavage in 2 directions and cleavage surfaces are often hard to see with even a binocular microscope. It is often confused with biotite and amphibole. Biotite is softer, darker and occurs in predominantly light-colored rocks Amphibole is also darker and occurs in needle-like crystals rather than the stubby shape of pyroxene. Association is the best guide for the identification of pyroexene. It is usually restricted to dark-colored rocks (the image below is of pyroxene is a very rare lightcolored rock called shonkenite) such as gabbro or basalt.

30 Olivine Olivine is common only in ultramafic igneous rocks like dunite and peridotite. Occurs as small, light green, glassy crystals (see image below). It has no cleavage. The texture of olivine in igneous rocks is often termed sugary. Run your fingers over the grains, do they feel like sandpaper? The mineral is most probably olivine. Although olivine occurs in gabbro and basalt, it is far more common in peridotite and dunite. Because of the light green color and sugary texture it is rarely confuded with other rock-forming minerals.

31

32 Rock Texture The most important distinction in igneous rocks is texture, which is related to the size and shape of the constituent crystallite grains. Igneous rocks have distinctive textures, characterized mostly by the interlocking grains that grow from cooling magma. In Igneous rocks, the cooling history and environment is the function of the formation of textures. Magmas located deep within the Earth's crust cools slowly and thus the individual minerals grains may grow. In contrast, lava extruded at the Earth's surface cools rapidly, where mineral grains do not have time to grow, therefore cannot be seen without the aid of a microscope. The rocks appear massive and structureless.

33 Phaneritic texture Individual grains are large enough and visible to naked eye. (Figure 3.2) Grains approximately equal in size, form interlocking mosaic and very coarse. Developed from magmas that cool slowly and common in intrusive bodies.

34 Examples of phaneritic rocks; phaneritic texture, consists of large grains and can be seen unaided

35 Aphanetic texture Individual crystals are so small and cannot be seen unaided. Rocks are massive and experienced rapid cooling that there was no sufficient time for the growth of large crystals. Characteristic of volcanic rock and some intrusive rocks which lost its heat to the surrounding country rock.

36 Aphanetic texture consists of grains too small to be seen without a microscope

37 Glassy texture Similar to ordinary glass. Crystals cannot be discerned in a glassy texture, even when the specimen is viewed under high magnification e.g. obsidian.

38 A glassy texture develops when molten rock material cools so rapidly

39 Porphyritic texture Larger earlier formed crystals are enclosed by a ground mass of smaller crystals. Cooling history of magma may begin slowly initially which developed coarse crystals and then while partly crystallized the magma may move to another environment in which the cooling is more rapid which precipitate fine crystals around the earlier coarse crystals.

40 A hand sample and a thin section of porphyritic aphanitic textured rocks. The porphyritic phaneritic texture results from two stages of cooling

41 Vesicular Texture This term refers to vesicles (holes, pores, or cavities) within the igneous rock. Vesicles are the result of gas expansion (bubbles), which often occurs during volcanic eruptions. Pumice and scoria are common types of vesicular rocks. The image below shows a basalt with vesicles, hence the name "vesicular basalt".

42 Vesicular rocks

43 Chemical and Mineralogical Composition The chemical and mineralogical composition of igneous rocks is a reflection of the composition of magma from which the rocks crystallized. Magma is variable in composition, most importantly in the amount of silica (Si0 2 ) that they contain (Table 3.0). The silica content ranges from less than 45% to more than 66%. Rocks that are rich in silica are called silicic or felsic, rocks and those that are low in silica content are called mafic rocks. Fortunately, colour provides a valuable clue for identification igneous rocks because the silicic rocks are mainly composed of lightly coloured minerals like quartz and feldspar, whereas the mafic rocks are dark coloured because of the abundance ferromagnesian minerals. The dark coloured ferromagnesian minerals are rich in iron and magnesium, include olivine, pyroxene and hornblende. The major igneous rock types fall into categories of high, intermediate and low silica content.

44 Cont d Silica content (SiO 2 ) which also controls the minerals that crystallize is used to further classify igneous rocks as follows: Acid: usually above 63% silica mostly feldspar minerals and quartz, for example granite. Basic: 45 to 55% silica mostly dark minerals plus plagioclase feldspar and/or feldspathoid minerals, for example basalt. Ultra basic: usually less than 45% silica mostly dark minerals such as olivine and pyroxene, for example peridotite.

45 Classification of Igneous Rock ACID INTERMEDIATE BASIC ULTRA BASIC Crystalline Texture Feldspar Orthoclase - Plagioclase Extrusive (Usual Occurrence) Intrusive Fine Medium Coarse Rhyolite Microgranite Granite Trachyte Microsyenite Syenite Andesite Microdiorite Diorite Basalt Dolerite Gabbro Ultrabasic lavas Peridotite porphyry Peridotite

46 Formation of Igneous Rocks (a) Intrusive Processes: Intrusive rocks which cool and solidify under pressure and at great depths are usually wholly crystalline in texture, since the conditions of cooling are conducive to crystal formation. Such rocks occur in masses of great extent, often going to unknown depths. Although originally formed deep underground, intrusive rocks are now widely exposed because of earth movement and erosion processes. Intrusion refers to the movement of magma from a magma chamber to a different subsurface location. Bodies of rock formed by the intrusive magma are called plutons. Rocks that make up plutons usually have phaneritic texture because the cooling time was sufficient to allow the formation of large crystals.

47 Types of Plutons Plutons differ in terms of size, shape and relationship to the rocks that were intruded by the magma, which are older rocks known as country rocks. A major group of plutons (Figure 3.0) is classified as tabular because they are thin in one dimension as compared with the other two dimensions. Common ones are: (a) Dykes (b) Sills (c) Laccoliths (d) Batholiths

48 Dykes Tabular or wall like mass. Results from magma injected into cracks and joints in rocks. Vary in width from a few cm to a few meters but not more than 3 meters wide. Largest known dyke in Zimbabwe, Africa which is 600 km long and average width of 10 km.

49 Sills Rising magma follows path of least resistance such as bedding plane, which separates layers of sedimentary rock. Magma injected between the layers form tabular intrusive body parallel to layering. Sills range from few centimeters to hundreds of meters thick and can extend to several kilometers.

50 Laccoliths Viscous magma injected between layers of sedimentary rock, tend to uparched the overlying strata forming mushroom shaped. Usually thicker in center and thinner near margin and may give rise to dome shaped hill. Can be several kilometers in diameter and thousands of meters thick and typically porphyritic.

51 Batholiths Largest rock bodies in the Earth's crust, generally granitic composition. Cover several thousand square kilometers and may be 60 km thick. Typically form in the deeper zones of mountain belts and are exposed only after considerable uplift and erosion.

52 Types of plutons

53 Extrusive Processes Extrusive rocks are formed from the violent eruption of volcanoes, fissures or cracks in the earth's cracks. Some materials will be emitted with gaseous extrusions into the atmosphere, where they will cool quickly and eventually fall to the earth's surface as volcanic ash and dust. The main product of volcanic action is a lava flow emitted from within the earth as a molten stream which flows over surface of the existing ground until it solidifies. Extrusive rocks are generally distinguished by their usual finegrained texture.

54 A Grouping of Igneous Rocks Mode of formation Rock Types Rock Textures EXTRUSIVE Lavas Glassy or fine-grained INTRUSIVE Minor Intrusions Major Intrusions Fine to moderately coarse-texture Coarsely crystalline

55 Granite Granite characterized by a granular texture, has feldspar and quartz (at least 20%) as its two most abundant minerals. In consequence most granite is light-coloured, Biotite or hornblende or both are also present in most granite with accessory apatite, magnetite and sphene. Granites can be fine, medium or coarse-grained depending on grain sizes of the essential minerals and porphyritic or non porphyritic depending on the absence or presence of phenocrysts (usually alkali feldspar) and/or muscovite.

56

57 Basalt Basalt is dark coloured (black to medium grey), fine grained (aphanitic) igneous rock composed of plagioclase, feldspar, pyroxene and magnetite with or without olivine and contain more than 53% by weight of SiO 2. Most basalts are non porphyritic but some contain phenocrysts of plagioclase, olivine and pyroxene. Basalt is the world's most abundant lava and is very widespread.

58 Gabbro Gabbro is dark coloured, coarse-grained, granular basic igneous rock consisting of essential calcium rich plagioclase, feldspar (approximately 60% augite and orthopyroxene plus or, minus olivine with accessory magnetite or ilmenite. Gabbros result from slow crystallization of magmas of basaltic composition. Gabbro is widely distributed in both large and small masses. Dykes and thin sills of fine-grained gabbro are especially common. In most of these small intrusions, the mineral grains are so small that they are barely recognizable without aid of microscope. Such gabbros, intermediate in grain size between basalt and normal grabbro, are called dolerite.

59 Diorite Diorite - is an intermediate, coarse-grained, granular igneous rock with up to 10% quartz, plagioclase and lesser amount of ferromagnesian minerals. The most common ferromagnesian minerals are hornblende, biotite and pyroxene. In general, diorite masses are much smaller than those of granites or granodiorite.

60

61 Crystallization of Magma Crystallization of magma is not a simple process. An experiment done by N.L.Bowen (Figure 3.6) in early 1900s demonstrated that minerals crystallize sequentially as the temperature drops in a silicate magma and that solid crystals can react with the liquid phase of the magma to form new minerals during the crystallization process. To explain crystallization process, assuming that initially we have a basaltic composition at about 1500 C. As temperature is slightly lowered, crystals begin to separate from the liquid. There are two crystallization sequences that are observed as the melt cools.

62 First sequence - crystallization of plagioclase This is solid-solution series between calcium-rich and sodium rich compositions. The first plagioclase crystals to form are higher in calcium content than the calcium content of the liquid phase. As the mixture continues to cool, the crystals that form have progressively less calcium and more sodium than the original plagioclase crystals. The crystallization of plagioclase follows what is called a continuous reaction series, in which the liquid and the crystals continuously change in composition until no liquid remains.

63 Second sequence - crystallization of ferromagnesian mineral The ferromagnesian minerals follow a second type of crystallization sequence. In this series, olivine is the first ferromagnesian mineral to crystallize. As the temperature decreases, no change in the olivine crystals occurs until a critical temperature is reached. At this point, augite rather than olivine begins to crystallize and the early-formed olivine crystals react with the liquid to form augite. These reactions are different from the continuous reaction of plagioclase because entirely new minerals with different internal structures form at specific temperatures. For this reason the ferromagnesian crystallization sequence is called a discontinuous reaction series. The same type of reaction occurs between augite and liquid to form hornblende at a lower temperature. The entire sequence of mineral crystallization is known as Bowen's Reaction Series.

64

65 Engineering and Igneous Rocks Igneous rocks vary greatly in suitability for various types of engineering projects. An engineering site investigation must answer two questions: 1) What rock types are present and how are they disturbed? 2) How have the rocks been changed or altered since formation? The geologists and engineers working on the project must determine the origin of the igneous rock, its contacts with adjoining rock types and their conditions and the mineralogy of the rocks. Unaltered intrusive igneous rocks generally are very suitable for most types of engineering projects: 1) The interlocking of mineral crystals gives the rock great strength and thus can provide adequate support for building or dam foundations can remain stable at high angles in excavations and require minimal support in tunnels. 2) Because of the dense interlocking of crystals within the rock, very little water can flow through. Therefore, unaltered intrusive rocks are well suited for construction of reservoirs because of the low potential for leakage.

66 Cont d The engineering properties of extrusive igneous rocks are much less uniform. Extrusive rocks contains pyroclastic materials and lahar deposits, which are much weaker than crystalline rocks. These rocks may be susceptible to slope failures in excavations and also provide more variable and generally weaker foundation support. In general, the water bearing capacity of extrusive rocks is much greater than intrusive rocks. This property can render the rocks unsuitable or reservoir or tunnel construction. Weathering produces other changes in the rock as well as fracturing. Chemical reactions between the minerals within the rock and air and water gradually form new minerals. Clay minerals are a common product of these alteration processes. The result is a significant loss of strength as the feldspars and ferromagnesian minerals are converted to clay. In warm humid climates, igneous rock bodies may be mantled with tens of meters of weathered material. The engineering properties of this material are totally different from the properties of unaltered rock. It is sufficient to note that a network of fractures within a rock mass can greatly increase the potential for failures of natural or excavated slopes and also increase the construction problems of dams, tunnels and other structures.

67 End of the Chapter 3.1 Q & A

Engineering Geology ECIV 2204

Engineering Geology ECIV 2204 Engineering Geology ECIV 2204 Instructor : Dr. Jehad Hamad 2017-2016 Chapter (3) Igneous Rocks Chapter 3: Rocks: Materials of the Solid Earth Igneous Rocks Chapter 3: Rocks: Materials of the Solid Earth

More information

Lab 3 - Identification of Igneous Rocks

Lab 3 - Identification of Igneous Rocks Lab 3 - Identification of Igneous Rocks Page - 1 Introduction A rock is a substance made up of one or more different minerals. Thus an essential part of rock identification is the ability to correctly

More information

Block: Igneous Rocks. From this list, select the terms which answer the following questions.

Block: Igneous Rocks. From this list, select the terms which answer the following questions. Geology 12 Name: Mix and Match: Igneous Rocks Refer to the following list. Block: porphyritic volatiles mafic glassy magma mixing concordant discontinuous reaction series igneous vesicular partial melting

More information

Lab 4 - Identification of Igneous Rocks

Lab 4 - Identification of Igneous Rocks Lab 4 - Identification of Igneous Rocks Page - Introduction A rock is a substance made up of one or more different minerals. Thus an essential part of rock identification is the ability to correctly recognize

More information

Rocks. Types of Rocks

Rocks. Types of Rocks Rocks Rocks are the most common material on Earth. They are naturally occurring aggregates of one or more minerals. 1 Igneous rocks, Types of Rocks Sedimentary rocks and Metamorphic rocks. 2 1 3 4 2 IGNEOUS

More information

Essentials of Geology, 11e

Essentials of Geology, 11e Essentials of Geology, 11e Igneous Rocks and Intrusive Activity Chapter 3 Instructor Jennifer Barson Spokane Falls Community College Geology 101 Stanley Hatfield Southwestern Illinois College Characteristics

More information

EPS 50 Lab 2: Igneous Rocks Grotzinger and Jordan, Chapter 4

EPS 50 Lab 2: Igneous Rocks Grotzinger and Jordan, Chapter 4 Name: EPS 50 Lab 2: Igneous Rocks Grotzinger and Jordan, Chapter 4 Introduction In the previous lab, we learned about mineral characteristics, properties and identities as well as the three basic rock

More information

9/4/2015. Feldspars White, pink, variable Clays White perfect Quartz Colourless, white, red, None

9/4/2015. Feldspars White, pink, variable Clays White perfect Quartz Colourless, white, red, None ENGINEERING GEOLOGY Chapter 1.0: Introduction to engineering geology Chapter 2.0: Rock classification Igneous rocks Sedimentary rocks Metamorphic rocks Chapter 3.0: Weathering & soils Chapter 4.0: Geological

More information

23/9/2013 ENGINEERING GEOLOGY. Chapter 2: Rock classification:

23/9/2013 ENGINEERING GEOLOGY. Chapter 2: Rock classification: ENGINEERING GEOLOGY Chapter 2: Rock classification: ENGINEERING GEOLOGY Chapter 1.0: Introduction to engineering geology Chapter 2.0: Rock classification Igneous rocks Sedimentary rocks Metamorphic rocks

More information

The 3 types of rocks:

The 3 types of rocks: Igneous Rocks and Intrusive Igneous Activity The 3 types of rocks:! Sedimentary! Igneous! Metamorphic Marble 1 10/7/15 SEDIMENTARY ROCKS Come from rocks sediments (rock fragments, sand, silt, etc.) Fossils

More information

EARTH SCIENCE. Geology, the Environment and the Universe. Chapter 5: Igneous Rocks

EARTH SCIENCE. Geology, the Environment and the Universe. Chapter 5: Igneous Rocks EARTH SCIENCE Geology, the Environment and the Universe Chapter 5: Igneous Rocks CHAPTER 5 Igneous Rocks Section 5.1 What are igneous rocks? Section 5.2 Classification of Igneous Rocks Click a hyperlink

More information

Chapter 4 8/27/2013. Igneous Rocks. and Intrusive Igneous Activity. Introduction. The Properties and Behavior of Magma and Lava

Chapter 4 8/27/2013. Igneous Rocks. and Intrusive Igneous Activity. Introduction. The Properties and Behavior of Magma and Lava Introduction Chapter 4 Igneous rocks form by the cooling of magma (or lava). Large parts of the continents and all the oceanic crust are composed of. and Intrusive Igneous Activity The Properties and Behavior

More information

Chapter 3: Igneous Rocks 3.2 IGNEOUS ROCK ORIGIN

Chapter 3: Igneous Rocks 3.2 IGNEOUS ROCK ORIGIN Chapter 3: Igneous Rocks Adapted by Lyndsay R. Hauber & Michael B. Cuggy (2018) University of Saskatchewan from Deline B, Harris R & Tefend K. (2015) "Laboratory Manual for Introductory Geology". First

More information

Igneous Rock Classification, Processes and Identification Physical Geology GEOL 100

Igneous Rock Classification, Processes and Identification Physical Geology GEOL 100 Igneous Rock Classification, Processes and Identification Physical Geology GEOL 100 Ray Rector - Instructor Major Concepts 1) Igneous rocks form directly from the crystallization of a magma or lava 2)

More information

Student Name: College: Grade:

Student Name: College: Grade: Student Name: College: Grade: Physical Geology Laboratory IGNEOUS MINERALS AND ROCKS IDENTIFICATION - INTRODUCTION & PURPOSE: In this lab you will learn to identify igneous rocks in hand samples from their

More information

CHAPTER ROCK WERE FORMED

CHAPTER ROCK WERE FORMED HOW CHAPTER 5 ROCK WERE FORMED 1 I. Modern geology- 1795 A. James Hutton- 1. uniformitarianism- "the present is the key to the past" a. b. the geologic processes now at work were also active in the past

More information

Plate tectonics, rock cycle

Plate tectonics, rock cycle Dikes, Antarctica Rock Cycle Plate tectonics, rock cycle The Rock Cycle A rock is a naturally formed, consolidated material usually composed of grains of one or more minerals The rock cycle shows how one

More information

IGNEOUS ROCKS. SECTION 5.1 What are igneous rocks?

IGNEOUS ROCKS. SECTION 5.1 What are igneous rocks? Date Period Name IGNEOUS ROCKS SECTION.1 What are igneous rocks? In your textbook, read about the nature of igneous rocks. Use each of the terms below just once to complete the following statements. basaltic

More information

Igneous Rock. Magma Chamber Large pool of magma in the lithosphere

Igneous Rock. Magma Chamber Large pool of magma in the lithosphere Igneous Rock Magma Molten rock under the surface Temperature = 600 o 1400 o C Magma Chamber Large pool of magma in the lithosphere Magma chamber - most all magma consists of silicon and oxygen (silicate)

More information

CHAPTER ROCK WERE FORMED

CHAPTER ROCK WERE FORMED HOW CHAPTER 3 ROCK WERE FORMED 1 I. Modern geology- 1795 A. James Hutton- 1. uniformitarianism- "the present is the key to the past" a. b. the geologic processes now at work were also active in the past

More information

GLY 155 Introduction to Physical Geology, W. Altermann. Grotzinger Jordan. Understanding Earth. Sixth Edition

GLY 155 Introduction to Physical Geology, W. Altermann. Grotzinger Jordan. Understanding Earth. Sixth Edition Grotzinger Jordan Understanding Earth Sixth Edition Chapter 4: IGNEOUS ROCKS Solids from Melts 2011 by W. H. Freeman and Company Chapter 4: Igneous Rocks: Solids from Melts 1 About Igneous Rocks Igneous

More information

Engineering Geology. Igneous rocks. Hussien Al - deeky

Engineering Geology. Igneous rocks. Hussien Al - deeky Igneous rocks Hussien Al - deeky 1 The Geology Definition of Rocks In Geology Rock is defined as the solid material forming the outer rocky shell or crust of the earth. There are three major groups of

More information

Imagine the first rock and the cycles that it has been through.

Imagine the first rock and the cycles that it has been through. A rock is a naturally formed, consolidated material usually composed of grains of one or more minerals The rock cycle shows how one type of rocky material gets transformed into another The Rock Cycle Representation

More information

Name Class Date STUDY GUIDE FOR CONTENT MASTERY

Name Class Date STUDY GUIDE FOR CONTENT MASTERY Igneous Rocks What are igneous rocks? In your textbook, read about the nature of igneous rocks. Use each of the terms below just once to complete the following statements. extrusive igneous rock intrusive

More information

The Nature of Igneous Rocks

The Nature of Igneous Rocks The Nature of Igneous Rocks Form from Magma Hot, partially molten mixture of solid liquid and gas Mineral crystals form in the magma making a crystal slush Gases - H 2 O, CO 2, etc. - are dissolved in

More information

Name Class Date STUDY GUIDE FOR CONTENT MASTERY

Name Class Date STUDY GUIDE FOR CONTENT MASTERY Igneous Rocks What are igneous rocks? In your textbook, read about the nature of igneous rocks. Use each of the terms below just once to complete the following statements. extrusive igneous rock intrusive

More information

Rocks: Materials of the Solid Earth

Rocks: Materials of the Solid Earth 1 Rocks: Materials of the Solid Earth Presentation modified from: Instructor Resource Center on CD-ROM, Foundations of Earth Science,, 4 th Edition, Lutgens/Tarbuck, Rock Cycle Igneous Rocks Today 2 Rock

More information

Chapter 4 Rocks & Igneous Rocks

Chapter 4 Rocks & Igneous Rocks Chapter 4 Rocks & Igneous Rocks Rock Definition A naturally occurring consolidated mixture of one or more minerals e.g, marble, granite, sandstone, limestone Rock Definition Must naturally occur in nature,

More information

EESC 4701: Igneous and Metamorphic Petrology IGNEOUS ROCK CLASSIFICATION LAB 2 HANDOUT

EESC 4701: Igneous and Metamorphic Petrology IGNEOUS ROCK CLASSIFICATION LAB 2 HANDOUT EESC 4701: Igneous and Metamorphic Petrology IGNEOUS ROCK CLASSIFICATION LAB 2 HANDOUT Sources: University of Washington, Texas A&M University, University of Southern Alabama What is an igneous rock (a

More information

Igneous and Metamorphic Rock Forming Minerals. Department of Geology Mr. Victor Tibane SGM 210_2013

Igneous and Metamorphic Rock Forming Minerals. Department of Geology Mr. Victor Tibane SGM 210_2013 Igneous and Metamorphic Rock Forming Minerals Department of Geology Mr. Victor Tibane 1 SGM 210_2013 Grotzinger Jordan Understanding Earth Sixth Edition Chapter 4: IGNEOUS ROCKS Solids from Melts 2011

More information

What Do You See? Learning Outcomes Goals Learning Outcomes Think About It Identify classify In what kinds of environments do igneous rocks form?

What Do You See? Learning Outcomes Goals Learning Outcomes Think About It Identify classify In what kinds of environments do igneous rocks form? Section 2 Igneous Rocks and the Geologic History of Your Community What Do You See? Learning Outcomes In this section, you will Goals Text Learning Outcomes In this section, you will Identify and classify

More information

Earth Science 11: Earth Materials: Rock Cycle

Earth Science 11: Earth Materials: Rock Cycle Name: Date: Earth Science 11: Earth Materials: Rock Cycle Chapter 2, pages 44 to 46 2.1: Rock Cycle What is a Rock? A solid mass of mineral or mineral-like matter that occurs naturally as part of our planet

More information

Name. GEOL.3250 Geology for Engineers Igneous Rocks

Name. GEOL.3250 Geology for Engineers Igneous Rocks Name GEOL.3250 Geology for Engineers Igneous Rocks I. Introduction The bulk of the earth's crust is composed of relatively few minerals. These can be mixed together, however, to give an endless variety

More information

How 2 nd half labs will work

How 2 nd half labs will work How 2 nd half labs will work Continue to use your mineral identification skills Learn to describe, classify, interpret rock hand samples: Igneous sedimentary metamorphic volcanic plutonic (1 week) (1 wk)

More information

Lecture 3 Rocks and the Rock Cycle Dr. Shwan Omar

Lecture 3 Rocks and the Rock Cycle Dr. Shwan Omar Rocks A naturally occurring aggregate of one or more minerals (e.g., granite), or a body of non-crystalline material (e.g., obsidian glass), or of solid organic material (e.g., coal). Rock Cycle A sequence

More information

Lecture 6 - Igneous Rocks and Volcanoes

Lecture 6 - Igneous Rocks and Volcanoes Lecture 6 - Igneous Rocks and Volcanoes Learning objectives Understand and be able to predict where and why magma will be forming at different tectonic settings Understand the factors controlling magma

More information

Igneous Rocks. Sedimentary Rocks. Metamorphic Rocks

Igneous Rocks. Sedimentary Rocks. Metamorphic Rocks Name: Date: Igneous Rocks Igneous rocks form from the solidification of magma either below (intrusive igneous rocks) or above (extrusive igneous rocks) the Earth s surface. For example, the igneous rock

More information

The Rock Cycle The Rock Cycle illustrates the origin of igneous, sedimentary and metamorphic rocks

The Rock Cycle The Rock Cycle illustrates the origin of igneous, sedimentary and metamorphic rocks The Rock Cycle The Rock Cycle illustrates the origin of igneous, sedimentary and metamorphic rocks Igneous rocks form as molten magma or lava cools and solidifies. Magma is completely or partly molten

More information

A Rock is A group of minerals that have been put together in several different ways.

A Rock is A group of minerals that have been put together in several different ways. A Rock is A group of minerals that have been put together in several different ways. Depending on how they are put together, rocks are classified as: 1. Sedimentary 2. Igneous 3. Metamorphic Sedimentary

More information

Name Class Date. In your textbook, read about the nature of igneous rocks. Use each of the terms below just once to complete the following statements.

Name Class Date. In your textbook, read about the nature of igneous rocks. Use each of the terms below just once to complete the following statements. CHAPTER 5 Igneous Rocks SECTION 5.1 What are igneous rocks? In your textbook, read about the nature of igneous rocks. Use each of the terms below just once to complete the following statements. basaltic

More information

A Rock is a solid aggregate of minerals.

A Rock is a solid aggregate of minerals. Quartz A Rock is a solid aggregate of minerals. Orthoclase Feldspar Plagioclase Feldspar Biotite Four different minerals are obvious in this piece of Granite. The average automobile contains: Minerals

More information

Earth Science 11: Minerals

Earth Science 11: Minerals lname: Date: Earth Science 11: Minerals Purpose: Text Pages: I can identify and classify minerals using their physical and chemical properties 90-111 *This is recommended reading! Matter and Atoms (5.1)

More information

To get you thinking What natural process is responsible for the appearance of these rocks? Rocks and the Rock Cycle

To get you thinking What natural process is responsible for the appearance of these rocks? Rocks and the Rock Cycle To get you thinking What natural process is responsible for the appearance of these rocks? Rocks and the Rock Cycle Bell Ringer Name the 3 types of rock. Is one type of rock able to change into a different

More information

Igneous Rocks. Definition of Igneous Rocks. Igneous rocks form from cooling and crystallization of molten rock- magma

Igneous Rocks. Definition of Igneous Rocks. Igneous rocks form from cooling and crystallization of molten rock- magma Igneous Rocks Definition of Igneous Rocks Igneous rocks form from cooling and crystallization of molten rock- magma Magma molten rock within the Earth Lava molten rock on the Earth s s surface Igneous

More information

Igneous Rocks. Magma molten rock material consisting of liquid rock and crystals. A variety exists, but here are the end members:

Igneous Rocks. Magma molten rock material consisting of liquid rock and crystals. A variety exists, but here are the end members: Igneous Rocks Magma molten rock material consisting of liquid rock and crystals. A variety exists, but here are the end members: Types of Magma Basaltic, Basic or Mafic very hot (900-1200 C) very fluid

More information

INTRODUCTION ROCK COLOR

INTRODUCTION ROCK COLOR LAST NAME (ALL IN CAPS): FIRST NAME: 6. IGNEOUS ROCKS Instructions: Some rocks that you would be working with may have sharp edges and corners, therefore, be careful when working with them! When you are

More information

lava magma pyroclastic materials lava flow igneous rock volcanic (extrusive igneous) rock plutonic (intrusive igneous) rock felsic magma mafic magma

lava magma pyroclastic materials lava flow igneous rock volcanic (extrusive igneous) rock plutonic (intrusive igneous) rock felsic magma mafic magma magma lava lava flow pyroclastic materials igneous rock volcanic (extrusive igneous) rock plutonic (intrusive igneous) rock felsic magma mafic magma intermediate magma viscosity magma chamber Bowen s reaction

More information

Rocks Rock- A group of minerals, glass, mineroid bound together in some way.

Rocks Rock- A group of minerals, glass, mineroid bound together in some way. Rocks Rock- A group of minerals, glass, mineroid bound together in some way. All rocks fit into one of three categories: Igneous- formed by the cooling and hardening of hot molten rock Sedimentary- formed

More information

Igneous Rocks and Intrusive Activity

Igneous Rocks and Intrusive Activity Summary IGNEOUS ROCKS AND METAMORPHIC ROCKS DERIVED FROM IGNEOUS parents make up about 95 percent of Earth s crust. Furthermore, the mantle, which accounts for more than 82 percent of Earth s volume, is

More information

Geology 101. Reading Guide for Chapters 1, 4, and 5

Geology 101. Reading Guide for Chapters 1, 4, and 5 Geology 101 Name Reading Guide for Chapters 1, 4, and 5 The purpose of the Reading Guides is to help you sort out the most important ideas in the text. I recommend answering the questions as you read the

More information

Thursday, October 4 th

Thursday, October 4 th Thursday, October 4 th Objective: We will use and define the different ways to classify igneous rocks. Warm-up: 1. Which type of lava is most viscous? 2. Which type of lava has the least amount of silicate?

More information

Directed Reading. Section: Rocks and the Rock Cycle. made of a. inorganic matter. b. solid organic matter. c. liquid organic matter. d. chemicals.

Directed Reading. Section: Rocks and the Rock Cycle. made of a. inorganic matter. b. solid organic matter. c. liquid organic matter. d. chemicals. Skills Worksheet Directed Reading Section: Rocks and the Rock Cycle 1. The solid part of Earth is made up of material called a. glacial ice. b. lava. c. rock. d. wood. 2. Rock can be a collection of one

More information

GEOL FORENSIC GEOLOGY ROCK IDENTIFICATION

GEOL FORENSIC GEOLOGY ROCK IDENTIFICATION GEOL.2150 - FORENSIC GEOLOGY ROCK IDENTIFICATION Name I. Introduction There are three basic types of rocks - igneous, sedimentary, and metamorphic: Igneous. Igneous rocks have solidified from molten matter

More information

Igneous Rocks and the Geologic History of Your Community

Igneous Rocks and the Geologic History of Your Community Ch 1 Bedrock Geology 9/17/04 12:48 PM Page 14 Activity 2 Igneous Rocks and the Geologic History of Your Community Goals In this activity you will: Identify several igneous rocks using a rock chart. Describe

More information

Rock Identification. invisible rhyolite andesite basalt komatiite. visible granite diorite gabbro peridotite

Rock Identification. invisible rhyolite andesite basalt komatiite. visible granite diorite gabbro peridotite Rock Identification The samples in this lab are arranged into four groups: igneous, sedimentary, metamorphic, and unknown. Study the igneous, sedimentary, and metamorphic collections to get an idea of

More information

Igneous Processes I: Igneous Rock Formation, Compositions, and Textures

Igneous Processes I: Igneous Rock Formation, Compositions, and Textures Igneous Processes I: Igneous Rock Formation, Compositions, and Textures Crustal Abundances of Rock Types Igneous Rocks Form by the cooling and hardening (crystallization/glassification) of magma. There

More information

A. IGNEOUS Rocks formed by cooling and hardening of hot molten rock called magma (within crust or at its surface).

A. IGNEOUS Rocks formed by cooling and hardening of hot molten rock called magma (within crust or at its surface). EARTH SCIENCE 11 CHAPTER 5 NOTES KEY How Earth's Rocks Were Formed Early geologists believed that the physical features of the Earth were formed by sudden spectacular events called CATASTROPHES. Modern

More information

6. IGNEOUS ROCKS AND VOLCANIC HAZARDS

6. IGNEOUS ROCKS AND VOLCANIC HAZARDS LAST NAME (ALL IN CAPS): FIRST NAME: 6. IGNEOUS ROCKS AND VOLCANIC HAZARDS Instructions: Refer to Laboratory 5 in your lab book on pages 129-152 to answer the questions in this work sheet. Your work will

More information

Quiz Five (9:30-9:35 AM)

Quiz Five (9:30-9:35 AM) Quiz Five (9:30-9:35 AM) UNIVERSITY OF SOUTH ALABAMA GY 111: Physical Geology Lecture 10: Intrusive Igneous Rocks Instructor: Dr. Douglas W. Haywick Last Time 1) Pyro-what? (air fall volcanic rocks) 2)

More information

Minerals Give Clues To Their Environment Of Formation. Also. Rocks: Mixtures of Minerals

Minerals Give Clues To Their Environment Of Formation. Also. Rocks: Mixtures of Minerals Minerals Give Clues To Their Environment Of Formation!!Can be a unique set of conditions to form a particular mineral or rock!!temperature and pressure determine conditions to form diamond or graphite

More information

Introduction. Volcano a vent where molten rock comes out of Earth

Introduction. Volcano a vent where molten rock comes out of Earth Introduction Volcano a vent where molten rock comes out of Earth Example: Kilauea Volcano, Hawaii Hot (~1,200 o C) lava pools around the volcanic vent. Hot, syrupy lava runs downhill as a lava flow. The

More information

Rock Cart for High School Students

Rock Cart for High School Students Rock Cart for High School Students Goals and Objectives for high school students (9 th 12 th grade): 1) Define igneous rocks 2) Discuss chemical composition of rocks 3) Understand the plate tectonics and

More information

Rocks. 1) igneous = fiery 2) sedimentary = settled 3) metamorphic = changed form

Rocks. 1) igneous = fiery 2) sedimentary = settled 3) metamorphic = changed form Rocks Identified on the basis of composition and texture (arrangement of features). Classification depends on description and interpretation of these features. Three major categories: 1) igneous = fiery

More information

Igneous Rocks. Igneous Rocks - 1. Environment of Formation - Magma - Plutonic - rock that formed within the Earth. Intrusive - Earth s crust.

Igneous Rocks. Igneous Rocks - 1. Environment of Formation - Magma - Plutonic - rock that formed within the Earth. Intrusive - Earth s crust. Name: Date: Period: Minerals and Rocks The Physical Setting: Earth Science CLASS NOTES - Methods to classify igneous rocks: 1. Environment of Formation - Magma - Plutonic - rock that formed within the

More information

THE ROCK CYCLE & ROCKS. Subtitle

THE ROCK CYCLE & ROCKS. Subtitle THE ROCK CYCLE & ROCKS Subtitle 3. Three rocks that do not have minerals or are composed of nonmineral matter. Coal Pumuce Obsidian THE ROCK CYCLE Why do scientists study rocks? Rocks contain clues about

More information

Chapter 10. Chapter Rocks and the Rock Cycle. Rocks. Section 1 Rocks and the Rock Cycle

Chapter 10. Chapter Rocks and the Rock Cycle. Rocks. Section 1 Rocks and the Rock Cycle Chapter 10 Rocks 1 Chapter 10 Section 1 Rocks and the Rock Cycle 2 10.1 Rocks and the Rock Cycle Magma is the parent material for all rocks. Once the magma cools and hardens, many changes can occur. Geology:

More information

Quartz. ! Naturally occurring - formed by nature. ! Solid - not liquid or gas. Liquid water is not a mineral

Quartz. ! Naturally occurring - formed by nature. ! Solid - not liquid or gas. Liquid water is not a mineral GEOL 110 - Minerals, Igneous Rocks Minerals Diamond Azurite Quartz Why Study Minerals?! Rocks = aggregates of minerals! Importance to Society?! Importance to Geology? 5 part definition, must satisfy all

More information

10/20/2015. How is magma different from lava? Magma is molten rock below the Earth s surface. Lava is magma that flows out onto Earth s surface.

10/20/2015. How is magma different from lava? Magma is molten rock below the Earth s surface. Lava is magma that flows out onto Earth s surface. Chapter 5 What are igneous rocks? How do they form? Igneous rocks are rocks that form when molten material cools and crystallizes. Molten material can be either magma or lava. How is magma different from

More information

ENVI.2030L Rock Identification

ENVI.2030L Rock Identification ENVI.2030L Rock Identification Name I. Introduction The bulk of the earth's crust is composed of relatively few minerals. These can be mixed together, however, to give an endless variety of rocks - aggregates

More information

Page 1. Name: 1) Which diagram best shows the grain size of some common sedimentary rocks?

Page 1. Name: 1) Which diagram best shows the grain size of some common sedimentary rocks? Name: 1) Which diagram best shows the grain size of some common sedimentary rocks? 1663-1 - Page 1 5) The flowchart below illustrates the change from melted rock to basalt. 2) Which processes most likely

More information

1. Which mineral is mined for its iron content? A) hematite B) fluorite C) galena D) talc

1. Which mineral is mined for its iron content? A) hematite B) fluorite C) galena D) talc 1. Which mineral is mined for its iron content? A) hematite B) fluorite C) galena D) talc 2. Which material is made mostly of the mineral quartz? A) sulfuric acid B) pencil lead C) plaster of paris D)

More information

Page 1. Name:

Page 1. Name: Name: 1) What is the approximate density of a mineral with a mass of 262.2 grams that displaces 46 cubic centimeters of water? A) 6.1 g/cm 3 C) 1.8 g/cm 3 B) 5.7 g/cm 3 D) 12.2 g/cm 3 2) In which two Earth

More information

Topics that will be discussed

Topics that will be discussed Topics that will be discussed The Rock Cycle Igneous Rock Sedimentary Rock Metamorphic Rock The Rock Cycle -Rocks The parent material for all rocks is MAGMA. What is MAGMA? -Rock forming Minerals Are:

More information

Name Petrology Spring 2006 Igneous rocks lab Part II Hand samples of igneous rocks Due Tuesday 3/7

Name Petrology Spring 2006 Igneous rocks lab Part II Hand samples of igneous rocks Due Tuesday 3/7 Igneous rocks lab Part II Hand samples of igneous rocks Due Tuesday 3/7 1. Use the color index and density of the rock to establish whether it is felsic, intermediate, mafic, or ultramafic. 2. Determine

More information

Chapter 4: Igneous Rocks and Plutons

Chapter 4: Igneous Rocks and Plutons Chapter 4: Igneous Rocks and Plutons Chapter Outline 4.1 Introduction 4.2 The Properties and Behavior of Magma and Lava 4.3 How Does Magma Originate and Change? 4.4 Igneous Rocks Their Characteristics

More information

2 Igneous Rock. How do igneous rocks form? What factors affect the texture of igneous rock? BEFORE YOU READ. Rocks: Mineral Mixtures

2 Igneous Rock. How do igneous rocks form? What factors affect the texture of igneous rock? BEFORE YOU READ. Rocks: Mineral Mixtures CHAPTER 2 2 Igneous Rock SECTION Rocks: Mineral Mixtures BEFORE YOU READ After you read this section, you should be able to answer these questions: How do igneous rocks form? What factors affect the texture

More information

Happy Tuesday. Pull out a ½ sheet of paper

Happy Tuesday. Pull out a ½ sheet of paper Happy Tuesday Pull out a ½ sheet of paper 1. Physical properties of a mineral are predominantly related to 1. the external conditions of temperature, pressure, and amount of space available for growth.

More information

GY 111: Physical Geology

GY 111: Physical Geology UNIVERSITY OF SOUTH ALABAMA GY 111: Physical Geology Lecture 9: Extrusive Igneous Rocks Instructor: Dr. Douglas W. Haywick Last Time 1) The chemical composition of the crust 2) Crystallization of molten

More information

Lab 3: Igneous Rocks

Lab 3: Igneous Rocks Lab 3: Igneous Rocks The Geology in YOUR life initiative Mount Shinmoedake erupts in Japan (Jan 26, 2010) Volcanic smoke rises from Mount Shinmoedake on 1 February, 2011. Smoke rises from Mount Shinmoedake

More information

Soil Mechanics/Geotechnical Engineering I Prof. Dilip Kumar Baidya Department of Civil Engineering Indian Institute of Technology, Kharagpur

Soil Mechanics/Geotechnical Engineering I Prof. Dilip Kumar Baidya Department of Civil Engineering Indian Institute of Technology, Kharagpur Soil Mechanics/Geotechnical Engineering I Prof. Dilip Kumar Baidya Department of Civil Engineering Indian Institute of Technology, Kharagpur Lecture - 01 Rock Cycle Good morning. I welcome you to this

More information

Unit 2 Exam: Rocks & Minerals

Unit 2 Exam: Rocks & Minerals Name: Date: 1. Base your answer(s) to the following question(s) on the 2001 edition of the Earth Science Reference Tables, the map and cross section below, and your knowledge of Earth science. The shaded

More information

Geology for Engineers Rocks

Geology for Engineers Rocks 89.325 Geology for Engineers Rocks Name I. Introduction The bulk of the earth's crust is composed of relatively few minerals. These can be mixed together, however, to give an endless variety of rocks -

More information

I m good. Thank you.

I m good. Thank you. I m good. Thank you. The Rock Cycle Ag Earth Science Chapter 3.1 A natural occurring, inorganic crystalline material with a unique chemical composition. mineral A consolidated mixture of minerals rock

More information

RR#7 - Multiple Choice

RR#7 - Multiple Choice 1. Which mineral is mined for its iron content? 1) hematite 2) fluorite 3) galena 4) talc 2. Which rock is composed of the mineral halite that formed when seawater evaporated? 1) limestone 2) dolostone

More information

PLATE TECTONICS, VOLCANISM AND IGNEOUS ROCKS

PLATE TECTONICS, VOLCANISM AND IGNEOUS ROCKS PLATE TECTONICS, VOLCANISM AND IGNEOUS ROCKS PLATE TECTONICS TO IGNEOUS ROCKS Internal Heat Seafloor Spreading/Plate Tectonics Volcanism Plate Boundary Intra-plate (hot spot) Divergent Convergent Igneous

More information

Igneous, Metamorphic & Sedimentary. Chapter 5 & Chapter 6

Igneous, Metamorphic & Sedimentary. Chapter 5 & Chapter 6 Igneous, Metamorphic & Sedimentary Chapter 5 & Chapter 6 Section 5.1 What are Igneous Rocks? Compare and contrast intrusive and extrusive igneous rocks. Describe the composition of magma Discuss the factors

More information

REMINDER. MOVIE: Rocks that Originate Underground 5:41 to 12:40

REMINDER. MOVIE: Rocks that Originate Underground 5:41 to 12:40 REMINDER 2 chapters covered next week Sedimentary Rocks Soils and Weathering (first half) Learn vocabulary for both! Turn to Neighbor: Without using your book or notes, try to remember which te mineral

More information

Structure of the Earth

Structure of the Earth And the ROCK CYCLE Structure of the Earth Compositional (Chemical) Layers Crust: Low density High in silicon (Si) and oxygen (O) Moho: Density boundary between crust and mantle Mantle: Higher density High

More information

Rocks. Rocks are composed of 1 or more minerals. Rocks are classified based on how they formed (origin). 3 classes of rocks:

Rocks. Rocks are composed of 1 or more minerals. Rocks are classified based on how they formed (origin). 3 classes of rocks: ROCKS Rocks If a mineral is a naturally occurring homogeneous solid, inorganically formed, with a definite chemical composi:on and a crystalline structure then what is a rock? Rocks Rocks are composed

More information

LAB 2 IDENTIFYING MATERIALS FOR MAKING SOILS: ROCK AND PARENT MATERIALS

LAB 2 IDENTIFYING MATERIALS FOR MAKING SOILS: ROCK AND PARENT MATERIALS LAB 2 IDENTIFYING MATERIALS FOR MAKING SOILS: ROCK AND PARENT MATERIALS Learning outcomes The student is able to: 1. understand and identify rocks 2. understand and identify parent materials 3. recognize

More information

Earth Science Chapter 6 Rocks

Earth Science Chapter 6 Rocks Earth Science Chapter 6 Rocks I. Rocks and the Rock Cycle * Material that makes up the solid part of the Earth. * Made of a variety of different combinations of minerals and organic matter. A. Three Major

More information

Chapter: Earth Materials

Chapter: Earth Materials Table of Contents Chapter: Earth Materials Section 1: Minerals Section 2: Igneous Rocks Section 3: Sedimentary Rocks Section 4: Metamorphic Rocks and the Rock Cycle 1 Minerals Common Elements Composition

More information

Review - Unit 2 - Rocks and Minerals

Review - Unit 2 - Rocks and Minerals Review - Unit 2 - Rocks and Minerals Base your answers to questions 1 and 2 on the diagram below, which shows the results of three different physical tests, A, B, and C, that were performed on a mineral.

More information

Evolution of the Earth

Evolution of the Earth Evolution of the Earth http://static.newworldencyclopedia.org/f/fe/geologic_clock.jpg Evolution of the Earth Solar system, 4.6 byr Collapse of a nebula Star forms as gravity concentrates material at center

More information

Rocks: Materials of the Solid Earth

Rocks: Materials of the Solid Earth Chapter 2 Lecture Outline Foundations of Earth Science Seventh Edition Rocks: Materials of the Solid Earth Natalie Bursztyn Utah State University Focus Question 2.1 What processes can transform a rock

More information

Rocks. 3.1 The Rock Cycle. 3.1 The Rock Cycle. 3.1 The Rock Cycle. The Rock Cycle. I. Rocks

Rocks. 3.1 The Rock Cycle. 3.1 The Rock Cycle. 3.1 The Rock Cycle. The Rock Cycle. I. Rocks Rocks Tarbuck Lutgens 3.1 The Rock Cycle 3.1 The Rock Cycle I. Rocks Rocks are any solid mass of mineral or mineral-like matter occurring naturally as part of our planet. Types of Rocks 1. Igneous rock

More information

Instructor: Ms. Terry J. Boroughs Geology 8 INTRODUCTION TO ROCKS AND THE ROCK CYCLE

Instructor: Ms. Terry J. Boroughs Geology 8 INTRODUCTION TO ROCKS AND THE ROCK CYCLE DATE DUE: Name: Instructor: Ms. Terry J. Boroughs Geology 8 INTRODUCTION TO ROCKS AND THE ROCK CYCLE Instructions: Read each question carefully before selecting the BEST answer Provide specific and detailed

More information

Practice Test Rocks and Minerals. Name. Page 1

Practice Test Rocks and Minerals. Name. Page 1 Name Practice Test Rocks and Minerals 1. Which rock would be the best source of the mineral garnet? A) basalt B) limestone C) schist D) slate 2. Which mineral is mined for its iron content? A) hematite

More information

Angel International School - Manipay

Angel International School - Manipay c Grade 8 Angel International School - Manipay 1 st Term Examination November, 2016 Chemistry PART I Multiple Choice Questions. Duration: 02 Hours Index No:- (1) A common sedimentary rock which is formed

More information

WHAT ARE ROCKS? ROCKS are a naturally occurring SOLID MIXTURE of one or more minerals and organic matter. Rocks are ALWAYS changing.

WHAT ARE ROCKS? ROCKS are a naturally occurring SOLID MIXTURE of one or more minerals and organic matter. Rocks are ALWAYS changing. WHAT ARE ROCKS? ROCKS are a naturally occurring SOLID MIXTURE of one or more minerals and organic matter. Rocks are ALWAYS changing. How do we classify Rocks? Formation (where and how the rock was formed)

More information