Continental Environments. Continental Environments. Chapter 9. Deserts Alluvial fans Rivers (fluvial) and floodplains Lakes (lacustrine) Glacial
|
|
- Kerry King
- 6 years ago
- Views:
Transcription
1 Continental Environments Chapter 9 Continental Environments Deserts Alluvial fans Rivers (fluvial) and floodplains Lakes (lacustrine) Glacial
2 Desert Biome low-latitude deserts approximately between 18 to 28, edge of the equatorial subtropical high pressure belt and trade winds Descending air masses therefore rarely hold much moisture for precipitation covers 12 % of the Earth's land surface. Temperature Range: 16 C Annual Precipitation: 0.25 cm (0.1 in). All months less than 0.25 cm (0.1 in). World Climate Zones Eolian Cross Sets
3 Eolian (Desert) Deposits Most between latitude Coarsest clasts remain as deflation lag (desert pavement) Sands are well sorted & rounded; surface pitting and frosting Large-scale planar-tabular or trough- and wedge-shaped cross beds Diagnostic Features TECTONIC SETTING Mountain rain shadows, associated with desert deposits GEOMETRY Dune fields can cover 100's km2; tabular bodies up to 35 m thick SEQUENCE Large-scale x-beds, foresets dip 25-30; deflation gravel or pebble lags SEDIMENTOLOGY Well-sorted, well rounded quartz-rich sand; Large scale x-beds comprised of smaller scale low-amplitude wind ripples Alluvial fans common in modern and ancient deposits; most common in semi-arid region where pronounced gradient or abrupt relief exists (highland, hills, mountains, faulting scarps); preservation potential high when building into lakes, rivers, playas, flood plains; May be divided into upper, mid, and lower fans; commonly associated with intermittent current dunes and salt lake (playa) or salt flat (sabkha) deposits. prograding alluvial fans: overall coarsening-upward succession.
4 Boggs 2001 Alluvial Fans, Baffin Island Different types of fans Debris-Flow Fans Braided Fluvial Fans Lowsinuosity/meandering Fluvial Fans Boggs 2001
5 Sediment Gravity Flows Boggs 2001 Proximal Fan Poorly sorted, large, angular clasts coarse, thick-bedded, poorly stratified alluvial fan deposits. Note lack of channels
6 Fluvial Environments Deposits of rivers and associated environments Widespread in sedimentary rock record Fluvial Environments Morphological components: Valleys Channels Interfluves (floodplains) Drainage basins Headlands erosional (generally ) Coastal plain depositional (generally ) Channel: Trough through which water runs. Press and Siever, 2001
7 Valley: Area between tops of slopes on both sides of the river Press and Siever, 2001 Floodplain: Flat area, about level with the top of the channel. Inundated during high discharges. Press and Siever, 2001 Channel Types Four principal types: Meandering winding, single channels Braided multiple channels that change location Anastamosing multiple channels that maintain their locations Straight (rare) Continuous gradation from one type to another
8 Fluvial Systems Straight (rare) Meandering Braided Anastamosed Boggs 2001 Components Bedforms (dunes, ripples, flat bed) Bars larger depositional units (transverse, linguoid, point) Channels different types Levees Overbank deposits floodplain, crevasse splays, paleosols, etc. Cutbank Point Bar Coarse-grained meandering Sandy bedforms Overbank Fines Walker and Cant 1984
9 Cutbank Point Bar Press and Siever, 2001 one km Timeslice 3-D seismic data Offshore, S.E. Asia Courtesy Henry Posamentier
10 Press and Siever, 2001 Modern Mississippi Floodplain Google Earth Walker and Cant 1984 Thalweg: deepest part of the channel, strongest currents
11 Lateral Accretion Surfaces Cretaceous (?) Colorado Lateral Accretion Surfaces Cretaceous Utah Fluvial Environments Floods: Streams overspill their banks, innundating floodplain Short-term increase in discharge Frequency variable, depends on location
12 Press and Siever, 2001 Press and Siever, 2001
13 Fluvial Environments Floodplain deposits Mud (shale) deposited during floods Crevasse splays breaches in levees Sandy, rippled, fan shape Rooted horizons Coal, carbonaceous shale Paleosols Floodplain (channels and paleosols) Cretaceous, New Mexico
14 Channel sand surrounded by finegrained floodplain deposits Classic finingupward point bar succession Thickness will be proportional to channel depth Walker and Cant 1984 Sandy Braided System Sand flats Downstream accretion Sandy bedforms Walker and Cant 1984
15 Gravel-bed braided system Gravel bars & bedforms Walker and Cant 1984 Sand Flat (Compound bar) 3-D Dunes (Linguoid Bars) Walker and Cant 1984 Brahmaputra River Bangladesh
16 braid plain defined by edge of vegetation Stacked?braided fluvial sandstones Cretaceous, New Mexico Braided stream facies broad and shallow channel bars (longitudinal, transverse) are main sites of sediment accumulation gravel sediment dominant vs. sandgrade sediment dominant 2-D dunes most common: planar (tabular) x-beds dominant vertical succession: stacked dunes with planar x-stratification
17 Geometry of Braided River Deposits Walker and Cant 1984 Anastamosing Overbank Fines Swamps (peat/coal) and small floodplain lakes Sandy bedforms Channel Walker and Cant 1984 Channel Types Morphology of fluvial system controls sandbody geometry Braided: sheet sandstones, high sand/shale ratio Meandering: sandstones lenticular in crosssection, moderate/low sand/shale ratio, finingupward successions Anastomosing: shoestring sandstones in shale, low sand/shale ratio
18 Lakes Open lakes have an outflow (i.e. a river) sediments dominated by terriginous particles and organic matter Closed lakes have no outflow solutes are not carried out of the basin alkalinity can build up such that carbonates and evaporites can precipitate. A lake can alternate between open and closed with tectonic or hydrologic changes Lakes Deposits in open lakes come mainly from rivers but may also be deposited by wind, ice-rafting, and other processes. Sedimentation in closed lake systems consists of evaporite minerals, carbonate muds, sands, and silts. Lacustrine deposits are often rich in organic matter Distribution of Open Lakes
19 Distribution of Closed Lakes Transport mechanisms and kinds of siliciclastic sediments in lakes with annual thermal layering Boggs, 2001 Varves-Ellismere Island coarser lighter spring runoff, then finer darker fall dieoff (
20 Open Lakes Boggs 2001 Alkaline Lakes Closed lakes subject to limited replenishment from rainfall Buildup of salinity as there is no outlet Evaporites such as Sodium sulfate deposits of Saskatchewan The main uses of sodium sulphate are in the pulp and paper, powder detergent, glass and dyeing industries.
21 Boggs 2001 Diagnostic Features of LACUSTRINE DEPOSITS TECTONIC SETTING Fault grabens or downwarped basins; associated with other nonmarine settings GEOMETRY Circular or elongate; lenticular in cross section SEQUENCE Coarsening upwards from laminated shale, marl to ripple & cross- bedded sand. Cyclicity possible. SEDIMENTOLOGY Mudstones, shales, sandstones; carbonate, gypsum, halite; dessication features. Nonmarine fossils Glacial Deposits Glacier: Large masses of ice on land that show evidence of being in motion or of once having moved Two types: valley glaciers, continental glaciers
22 Press and Siever, 2001 Glacial Deposits Glacier formation Low Temperature (high latitude or high altitude) Snow accumulation > ablation Snow compacts, turns to ice Movement Gravity as driving force Basal slip and/or plastic flow Rates: m/yr (km/yr in surges) Press and Siever, 2001
23 Glacial Deposits Flowing ice erodes rock & regolith Erosional forms: Striations, U-shaped valleys, Fjords, Cirques, Roche moutonée Flowing ice transports sediment Sediment deposited where ice melts Press and Siever, 2001 Press and Siever, 2001
24 Glacial Deposits Deposition: Drift material of glacial origin Till: deposited directly by ice Outwash: deposited by glacial meltwater Loess: deposited by wind Glaciolacustrine: deposited in glacial lakes Glaciomarine: deposited in the sea by/close to ice Erratic: large boulder in till Press and Siever, 2001 Boggs, 2001
25 Glacial Deposits Composite that includes eolian, fluvial, lacustrine, and even marine environments Ice-contact deposits characterized by extremely poor sorting and lack of stratification Lakes and marine deposits may have dropstones Glacial Episodes Glacial sediments in N.A.
26 Summary
Chapter 8: Learning objectives
Chapter 8: Learning objectives Understand concept of sedimentary facies Signinifance of lateral and vertical facies associations Walther s Law Understand the sedimentary facies of alluvial fans, eolian
More informationThe Hydrologic Cycle
CONTINENTAL DEPOSITIONAL ENVIRONMENTS fluvial desert lacustrine (lake) Glacial KEY PARAMETERS (VARIABLES) 1. Climate (Hydrologic Cycle) Annual Precip vs. Seasonality 2. Tectonics (Mountains) The Hydrologic
More informationLab 7: Sedimentary Structures
Name: Lab 7: Sedimentary Structures Sedimentary rocks account for a negligibly small fraction of Earth s mass, yet they are commonly encountered because the processes that form them are ubiquitous in the
More informationFacies Cryptic description Depositional processes Depositional environments Very well sorted. Desert dunes. Migration of straight crested mega ripples
Very well sorted Travelled grate distance, effective sorting 5 medium-grained sandstone with well rounded grains; large scale high angle planar cross-beds. Migration of straight crested mega ripples Desert
More informationPrentice Hall EARTH SCIENCE
Prentice Hall EARTH SCIENCE Tarbuck Lutgens Chapter 7 Glaciers, Desert, and Wind 7.1 Glaciers Types of Glaciers A glacier is a thick ice mass that forms above the snowline over hundreds or thousands of
More informationSediment and sedimentary rocks Sediment
Sediment and sedimentary rocks Sediment From sediments to sedimentary rocks (transportation, deposition, preservation and lithification) Types of sedimentary rocks (clastic, chemical and organic) Sedimentary
More informationChapter 5: Glaciers and Deserts
I. Glaciers and Glaciation Chapter 5: Glaciers and Deserts A. A thick mass of ice that forms over land from the compaction and recrystallization of snow and shows evidence of past or present flow B. Types
More informationES120 Sedimentology/Stratigraphy
Midterm Exam 5/05/08 NAME: 1. List or describe 3 physical processes that contribute to the weathering of rocks (3pts). exfoliation frost wedging many others. roots, thermal expansion/contraction also credit
More informationChapter 5. The Sedimentary Archives
Chapter 5 The Sedimentary Archives Factors affecting Sedimentary Characteristics 1. Tectonic setting 2. Physical, chemical, and biological processes in the depositional environment 3. Method of sediment
More informationBell Ringer. Are soil and dirt the same material? In your explanation be sure to talk about plants.
Bell Ringer Are soil and dirt the same material? In your explanation be sure to talk about plants. 5.3 Mass Movements Triggers of Mass Movements The transfer of rock and soil downslope due to gravity is
More informationLecture 19: Fluvial Facies
GEOL 440 Sedimentology and stratigraphy: processes, environments and deposits Lecture 19: Fluvial Facies Aims Examine controls on alluvial channel pattern List the types of channel pattern Examine meandering
More informationThe boundary between two formations (or any distinct layers) is called a contact. Sedimentary rocks cover 75% of continents.
Sedimentary Rocks Sedimentary rocks form at the Earth s surface through interactions of the hydrologic system and the crust. Fortunately, many of these processes are in operation today, and geologists
More informationGeo 302D: Age of Dinosaurs. LAB 2: Sedimentary rocks and processes
Geo 302D: Age of Dinosaurs LAB 2: Sedimentary rocks and processes Last week we covered the basic types of rocks and the rock cycle. This lab concentrates on sedimentary rocks. Sedimentary rocks have special
More informationFoundations of Earth Science, 6e Lutgens, Tarbuck, & Tasa
Foundations of Earth Science, 6e Lutgens, Tarbuck, & Tasa Glacial and Arid Landscapes Foundations, 6e - Chapter 4 Stan Hatfield Southwestern Illinois College Glaciers Glaciers are parts of two basic cycles
More informationDepositional Environments. Depositional Environments
Depositional Environments Geographic area in which sediment is deposited Characterized by a combination of geological process & environmental conditions Depositional Environments Geological processes:
More informationLecture Outlines PowerPoint. Chapter 6 Earth Science 11e Tarbuck/Lutgens
Lecture Outlines PowerPoint Chapter 6 Earth Science 11e Tarbuck/Lutgens 2006 Pearson Prentice Hall This work is protected by United States copyright laws and is provided solely for the use of instructors
More informationDepositional Environment
Depositional Environment Sedimentary depositional environment describes the combination of physical, chemical and biological processes associated with the deposition of a particular type of sediment. Types
More informationSediment and Sedimentary rock
Sediment and Sedimentary rock Sediment: An accumulation of loose mineral grains, such as boulders, pebbles, sand, silt or mud, which are not cemented together. Mechanical and chemical weathering produces
More information1. Any process that causes rock to crack or break into pieces is called physical weathering. Initial product = final product
Weathering 1. Any process that causes rock to crack or break into pieces is called physical weathering. Initial product = final product End Result of physical weathering is increased surface area. 2. Physical
More informationPaleo Lab #4 - Sedimentary Environments
Paleo Lab #4 - Sedimentary Environments page - 1. CHARACTERISTICS OF SEDIMENT Grain size and grain shape: The sizes and shapes of sedimentary particles (grains) are modified considerably during their transportation
More informationPre-Lab Reading Questions ES202
ES202 The are designed to encourage students to read lab material prior to attending class during any given week. Reading the weekly lab prior to attending class will result in better grade performance
More informationGY 111 Lecture Note Series Sedimentary Environments 2: Rivers and Deltas
GY 111 Lecture Notes D. Haywick (2008-09) 1 GY 111 Lecture Note Series Sedimentary Environments 2: Rivers and Deltas Lecture Goals A) Rivers and Deltas (types) B) Water Flow and sedimentation in river/deltas
More informationGY 402: Sedimentary Petrology
UNIVERSITY OF SOUTH ALABAMA GY 402: Sedimentary Petrology Lecture 17: Sandy Fluvial Depositional Environments Instructor: Dr. Douglas W. Haywick Last Time Volcaniclastic Sedimentary Rocks 1. Origin of
More informationThe Nature of Sedimentary Rocks
The Nature of Sedimentary Rocks Sedimentary rocks are composed of: Fragments of other rocks Chemical precipitates Organic matter or biochemically produced materials The Nature of Sedimentary Rocks Sedimentary
More informationLecture Outline Wednesday - Friday February 14-16, 2018
Lecture Outline Wednesday - Friday February 14-16, 2018 Quiz 2 scheduled for Friday Feb 23 (Interlude B, Chapters 6,7) Questions? Chapter 6 Pages of the Past: Sedimentary Rocks Key Points for today Be
More informationChapter 5 Sedimentary Environments
Chapter 3 Notes 1 Chapter 5 Sedimentary Environments A. The Tectonic Setting 1.Factors that determine the kind of sedimentary rock that will be formed in a particular area: a. the climate under which processes
More informationGEL 109 Midterm W01, Page points total (1 point per minute is a good pace, but it is good to have time to recheck your answers!
GEL 109 Midterm W01, Page 1 50 points total (1 point per minute is a good pace, but it is good to have time to recheck your answers!) 1. Where in a water flow is there usually a zone of laminar flow even
More informationName: Class: Date: Multiple Choice Identify the letter of the choice that best completes the statement or answers the question.
Name: Class: Date: geology ch 7 test 2008 Multiple Choice Identify the letter of the choice that best completes the statement or answers the question. 1. Which of the following is true about ice sheets?
More informationRIVERS, GROUNDWATER, AND GLACIERS
RIVERS, GROUNDWATER, AND GLACIERS Delta A fan-shaped deposit that forms when a river flows into a quiet or large body of water, such as a lake, an ocean, or an inland sea. Alluvial Fan A sloping triangle
More informationGlaciers form wherever snow and ice can accumulate High latitudes High mountains at low latitudes Ice temperatures vary among glaciers Warm
The Cryosphere Glaciers form wherever snow and ice can accumulate High latitudes High mountains at low latitudes Ice temperatures vary among glaciers Warm (temperate) glaciers: at pressure melting point,
More information2/23/2009. Visualizing Earth Science. Chapter Overview. Deserts and Drylands. Glaciers and Ice Sheets
Visualizing Earth Science By Z. Merali and B. F. Skinner Chapter 6 Deserts, Glaciers and Ice Sheets Chapter Overview Deserts and Drylands Glaciers and Ice Sheets Deserts Geography Categorization of deserts
More informationWhat are the different ways rocks can be weathered?
Romano - 223 What are the different ways rocks can be weathered? Weathering - the breakdown of rocks and minerals at the Earth s surface 1. 2. PHYSICAL WEATHERING Rock is broken into smaller pieces with
More informationGY 111: Physical Geology
UNIVERSITY OF SOUTH ALABAMA GY 111: Physical Geology Lecture 14: Sedimentary Rocks Part 2: Alluvial Fans and Rivers Instructor: Dr. Douglas W. Haywick Last Time 1) Types of Sediment 2) Sedimentary Rock
More informationPhysical Geology, 15/e
Lecture Outlines Physical Geology, 15/e Plummer, Carlson & Hammersley Deserts & Wind Action Physical Geology 15/e, Chapter 13 Deserts Desert any arid region that receives less than 25 cm of precipitation
More informationChapter 9 Notes: Ice and Glaciers, Wind and Deserts
Chapter 9 Notes: Ice and Glaciers, Wind and Deserts *Glaciers and Glacial Features glacier is a mass of ice that moves over land under its own weight through the action of gravity Glacier Formation must
More informationFLUVIAL LANDFORMS. Floodplains
FLUVIAL LANDFORMS Floodplains fairly flat & continuous surface occupying much of a valley bottom normally underlain by unconsolidated sediments subject to periodic flooding (usually once every year or
More informationMASS MOVEMENTS, WIND, AND GLACIERS
Date Period Name MASS MOVEMENTS, WIND, AND GLACIERS SECTION.1 Mass Movements In your textbook, read about mass movements. Use each of the terms below just once to complete the passage. avalanche creep
More informationPath of desire or path of least resistance?
Path of desire or path of least resistance? Desire Path: A term in landscape architecture used to describe a path that isn t designed but rather is worn casually away by people finding the shortest distance
More informationName. 4. The diagram below shows a soil profile formed in an area of granite bedrock. Four different soil horizons, A, B, C, and D, are shown.
Name 1. In the cross section of the hill shown below, which rock units are probably most resistant to weathering? 4. The diagram below shows a soil profile formed in an area of granite bedrock. Four different
More informationESC102. Sedimentary Rocks. Our keys to the past. Monday, February 11, 13
ESC102 Sedimentary Rocks Our keys to the past Sedimentary Rocks Sedimentary rocks are rocks that form through the accumulation of sediment and the process of lithification. Lithification occurs after deposition
More informationevery continent has an extensive dry region! " deserts are as much as 1/3 of Earth s surface!
deserts! deserts! every continent has an extensive dry region! " deserts are as much as 1/3 of Earth s surface! Hollywood portrayal of vast stretches of sand dune! " Sahara has only 10% covered by sand!
More informationClass Notes: Surface Processes
Name: Date: Period: Surface Processes The Physical Setting: Earth Science Class Notes: Surface Processes I. Weathering and Soils Weathering -! Sediments -! Weathering occurs when rocks are exposed to:
More informationUnderstanding Earth Fifth Edition
Understanding Earth Fifth Edition Grotzinger Jordan Press Siever Chapter 5: SEDIMENTATION: Rocks Formed by Surface Processes Lecturer: H Mohammadzadeh Assistant professors, Department of Geology, FUM Copyright
More informationUnit 3 Review - Surface Processes
Unit 3 Review - Surface Processes 1. Why is the surface of Mercury covered with meteor impact craters, while Earth s surface has relatively few craters? A) Mercury is larger than Earth, so it gets hit
More informationNAME: GEL 109 Final Winter 2010
GEL 109 Final Winter 2010 1. The following stratigraphic sections represents a single event followed by the slow accumulation of background sedimentation of shale. Describe the flows that produced the
More informationMass Movements, Wind, and Glaciers
Mass Movements,, and Glaciers SECTION 8.1 Mass Movement at Earth s Surface In your textbook, read about mass movement. Use each of the terms below just once to complete the passage. avalanche creep landslide
More informationWeathering & Erosion
Weathering & Erosion Weathering and Erosion Weathering - processes at or near Earth s surface that cause rocks and minerals to break down Erosion - process of removing Earth materials from their original
More informationLaboratory Exercise #4 Geologic Surface Processes in Dry Lands
Page - 1 Laboratory Exercise #4 Geologic Surface Processes in Dry Lands Section A Overview of Lands with Dry Climates The definition of a dry climate is tied to an understanding of the hydrologic cycle
More informationGY 402: Sedimentary Petrology
UNIVERSITY OF SOUTH ALABAMA GY 402: Sedimentary Petrology Lecture 13: Immature Siliciclastic Sedimentary Environments Alluvial Fans, Braided Streams Instructor: Dr. Douglas W. Haywick Last Time Immature
More informationFacies Analysis Of The Reservoir Rocks In The. Sylhet Trough, Bangladesh. Abstract
Facies Analysis Of The Reservoir Rocks In The Sylhet Trough, Bangladesh Joyanta Dutta Petroleum Geoscience Program, Department of Geology, Faculty of Science, Chulalongkorn University, Bangkok 10330, Thailand
More informationNAME: GEL 109 Final Study Guide - Winter 2008 Questions 6-24 WILL be on the final exactly as written here; this is 60% of the test.
GEL 109 Final Study Guide - Winter 2008 Questions 6-24 WILL be on the final exactly as written here; this is 60% of the test. 1. Sketch a map view of three types of deltas showing the differences in river,
More informationThe Agents of Erosion
The Agents of Erosion 1. Erosion & Deposition 2. Water 3. Wind 4. Ice California Science Project 1 1. Erosion and Deposition Erosion is the physical removal and transport of material by mobile agents such
More informationSediment. Weathering: mechanical and chemical decomposition and disintegration of rock and minerals at the surface
Sediment Some basic terminology Weathering: mechanical and chemical decomposition and disintegration of rock and minerals at the surface Erosion: removal of weathered rock and minerals from one place to
More informationGEL 109 Midterm W05, Page points total (1 point per minute is a good pace, but it is good to have time to recheck your answers!
GEL 109 Midterm W05, Page 1 50 points total (1 point per minute is a good pace, but it is good to have time to recheck your answers!) 1. Are the following flow types typically laminar or turbulent and
More informationModule 9 Sedimentary Rocks
Module 9 Sedimentary Rocks SEDIMENTARY ROCKS Rocks formed from material derived from preexisting rocks by surfacial processes followed by diagenesis There are two main classes of sedimentary rocks Clastic
More informationSTREAM SYSTEMS and FLOODS
STREAM SYSTEMS and FLOODS The Hydrologic Cycle Precipitation Evaporation Infiltration Runoff Transpiration Earth s Water and the Hydrologic Cycle The Hydrologic Cycle The Hydrologic Cycle Oceans not filling
More informationPrecipitation Evaporation Infiltration Earth s Water and the Hydrologic Cycle. Runoff Transpiration
STREAM SYSTEMS and FLOODS The Hydrologic Cycle Precipitation Evaporation Infiltration Earth s Water and the Hydrologic Cycle Runoff Transpiration The Hydrologic Cycle The Hydrologic Cycle Oceans not filling
More informationFigure 1 The map shows the top view of a meandering stream as it enters a lake. At which points along the stream are erosion and deposition dominant?
1. In which type of climate does chemical weathering usually occur most rapidly? 1. hot and dry 3. cold and dry 2. hot and wet 4. cold and wet 2. Figure 1 The map shows the top view of a meandering stream
More informationTopic 6: Weathering, Erosion and Erosional-Deposition Systems (workbook p ) Workbook Chapter 4, 5 WEATHERING
Topic 6: Weathering, Erosion and Erosional-Deposition Systems (workbook p. 95-125) Workbook Chapter 4, 5 THE BIG PICTURE: Weathering, erosion and deposition are processes that cause changes to rock material
More informationGEOLOGY MEDIA SUITE Chapter 5
UNDERSTANDING EARTH, SIXTH EDITION GROTZINGER JORDAN GEOLOGY MEDIA SUITE Chapter 5 Sedimentation Rocks Formed by Surface Processes 2010 W.H. Freeman and Company Mineralogy of sandstones Key Figure 5.12
More informationA Sedimentary Rock is..
Sedimentary Rocks A Sedimentary Rock is.. rock formed from the lithification or crystallization of: 1. Minerals in solution 2. Organic remains 3. Materials produced by living things (biochemical) 4. Clastic
More informationData Repository item
Data Repository (B25407): Localities and descriptions of measured sections of study areas Table 1. Localities of the measured sedimentary sections in the NW Sichuan Basin Section Number Stratigraphy Locality
More informationSand. Sand is any eroded material (igneous, metamorphic or sedimentary) that has a grain size from 1/16 th to 2 millimeters in size.
Sedimentology 001 What is sedimentology? Sedimentology...encompasses the study of modern sediments such as sand [1], mud (silt) [2] andclay [3] and understanding the processes that deposit them.[4] It
More informationChapter 2. Wearing Down Landforms: Rivers and Ice. Physical Weathering
Chapter 2 Wearing Down Landforms: Rivers and Ice Physical Weathering Weathering vs. Erosion Weathering is the breakdown of rock and minerals. Erosion is a two fold process that starts with 1) breakdown
More informationStreams. Water. Hydrologic Cycle. Geol 104: Streams
Streams Why study streams? Running water is the most important geologic agent in erosion, transportation and deposition of sediments. Water The unique physical and chemical properties of water make it
More informationWhat is weathering and how does it change Earth s surface? Answer the question using
7 th Grade Lesson What is weathering and how does it change Earth s surface? Answer the question using the sentence frame. You have 4 minutes. Weathering is. This changes the Earth s surface because. 1
More informationName: Which rock layers appear to be most resistant to weathering? A) A, C, and E B) B and D
Name: 1) The formation of soil is primarily the result of A) stream deposition and runoff B) precipitation and wind erosion C) stream erosion and mass movement D) weathering and biological activity 2)
More informationSedimentary Rocks. Weathering. Mechanical & Chemical Weathering. Sediments. Lithification. Deposition. Transport. Erosion.
Lithification Sedimentary Rocks Sediments Deposition Transport Erosion Weathering Weathering The sediments that make up sedimentary rocks are produced by: Mechanical & Chemical Weathering Mechanical Weathering
More informationSedimentary Rocks. Origin, Properties and Identification. Geology Laboratory GEOL 101 Lab Ray Rector - Instructor
Sedimentary Rocks Origin, Properties and Identification Geology Laboratory GEOL 101 Lab Ray Rector - Instructor Sedimentary Rock Origin and Identification Lab Pre-Lab Internet Link Resources 1) http://www.rockhounds.com/rockshop/rockkey/index.html
More information4 Formation of glacial ice 3. 5 Formation of glacial ice (cont.) 3. 6 Glacier economy and general flow structure 4
Contents 1 Glacier Flow 2 2 Definition 2 3 Amount 3 4 Formation of glacial ice 3 5 Formation of glacial ice (cont.) 3 6 Glacier economy and general flow structure 4 7 Example 5 8 Examples 6 9 Ice movement
More information1. The map below shows a meandering river. A A' is the location of a cross section. The arrows show the direction of the river flow.
1. The map below shows a meandering river. A A' is the location of a cross section. The arrows show the direction of the river flow. Which cross section best represents the shape of the river bottom at
More informationUnit 4: Landscapes Practice Problems
Name: Date: 1. Soil with the greatest porosity has particles that are A. poorly sorted and densely packed B. poorly sorted and loosely packed C. well sorted and densely packed D. well sorted and loosely
More informationSpring break reading. Glacial formation. Surface processes: Glaciers and deserts. The Control of Nature
suggested Spring break reading The Control of Nature by John McPhee Surface processes: Glaciers and deserts describes our efforts to control three natural hazards: 1. The Mississippi Floods 2. The Heimaey
More informationSedimentary Rocks. Origin, Properties and Identification. Physical Geology GEOL 101 Lab Ray Rector - Instructor
Sedimentary Rocks Origin, Properties and Identification Physical Geology GEOL 101 Lab Ray Rector - Instructor Sedimentary Rock Origin and Identification Lab Pre-Lab Internet Link Resources 1) http://www.rockhounds.com/rockshop/rockkey/index.html
More informationEOLIAN PROCESSES & LANDFORMS
EOLIAN PROCESSES & LANDFORMS Wind can be an effective geomorphic agent under conditions of sparse vegetation & abundant unconsolidated sediment egs. hot & cold deserts, beaches & coastal regions, glacial
More informationSection I: Multiple Choice Select the best answer to each question. Mark your final answer on the answer sheet. (1 pt each)
Sedimentary Rocks & Surface Processes Quest Name: Earth Science 2013 Block: Date: Section I: Multiple Choice Select the best answer to each question. Mark your final answer on the answer sheet. (1 pt each)
More informationWeathering, Erosion and Deposition
Weathering, Erosion and Deposition Shaping the Earth s Surface Weathering the process of breaking down rocks into smaller fragments Erosion the transport of rock fragments from one location to another
More informationThe boulder was most likely moved to this location by A) glacial ice B) prevailing wind C) streamfiow D) volcanic action
1. Which rock material was most likely transported to its present location by a glacier? A) rounded sand grains found in a river delta B) rounded grains found in a sand dune C) residual soil found on a
More informationChapter 6 Pages of Earth s Past: Sedimentary Rocks
Chapter 6 Pages of Earth s Past: Sedimentary Rocks Introduction! Drilling into the bottom of the North Sea, we encounter: " Soft mud and loose sand, silt, pebbles, and shells. Then: " Similar materials
More informationPage 1 of 9 Name: Base your answer to the question on the diagram below. The arrows show the direction in which sediment is being transported along the shoreline. A barrier beach has formed, creating a
More informationSedimentary Rocks. Origin, Properties and Identification. Physical Geology GEOL 100. Ray Rector - Instructor
Sedimentary Rocks Origin, Properties and Identification Physical Geology GEOL 100 Ray Rector - Instructor Sedimentary Rock Origin and Identification Lab Pre-Lab Internet Link Resources 1) http://www.rockhounds.com/rockshop/rockkey/index.html
More information4. The map below shows a meandering stream. Points A, B, C, and D represent locations along the stream bottom.
1. Sediment is deposited as a river enters a lake because the A) velocity of the river decreases B) force of gravity decreases C) volume of water increases D) slope of the river increases 2. Which diagram
More informationAmazing Ice: Glaciers and Ice Ages
Amazing Ice: Glaciers and Ice Ages Updated by: Rick Oches, Professor of Geology & Environmental Sciences Bentley University Waltham, Massachusetts Based on slides prepared by: Ronald L. Parker, Senior
More informationA Sedimentary Rock is..
Sedimentary Rocks A Sedimentary Rock is.. rock formed from the lithification or crystallization of: 1. Minerals in solution 2. Organic remains 3. Materials produced by living things (biochemical) 4. Clastic
More informationErosion Surface Water. moving, transporting, and depositing sediment.
+ Erosion Surface Water moving, transporting, and depositing sediment. + Surface Water 2 Water from rainfall can hit Earth s surface and do a number of things: Slowly soak into the ground: Infiltration
More informationES 105 Surface Processes I. Hydrologic cycle A. Distribution % in oceans 2. >3% surface water a. +99% surface water in glaciers b.
ES 105 Surface Processes I. Hydrologic cycle A. Distribution 1. +97% in oceans 2. >3% surface water a. +99% surface water in glaciers b. >1/3% liquid, fresh water in streams and lakes~1/10,000 of water
More informationChapter 2. Denudation: Rivers and Ice
Chapter 2. Denudation: Rivers and Ice DENUDATION: process that lowers level of land - caused by rivers, glaciers, waves & wind - involves processes of WEATHERING & EROSION Weathering Def: breakdown of
More informationNC Earth Science Essential Standards
NC Earth Science Essential Standards EEn. 2.1 Explain how processes and forces affect the Lithosphere. EEn. 2.1.1 Explain how the rock cycle, plate tectonics, volcanoes, and earthquakes impact the Lithosphere.
More informationUNIT 4 SEDIMENTARY ROCKS
UNIT 4 SEDIMENTARY ROCKS WHAT ARE SEDIMENTS Sediments are loose Earth materials (unconsolidated materials) such as sand which are transported by the action of water, wind, glacial ice and gravity. These
More information27. Running Water I (p ; )
27. Running Water I (p. 424-436; 440-444) Hydrosphere How much of the Earth s surface is covered by water? Earth's water is collectively called the and is stored in a number of so-called as follows: 1.
More informationTHE ACTION OF GLACIERS
Surface processes THE ACTION OF GLACIERS Glaciers are enormous masses of ice which are formed due to accumulation, compaction and re-crystallisation of the snow deposited in very cold regions (the majority
More informationIgneous 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 Classification of sedimentary rocks Sedimentary rocks are products of weathered, fragmented or dissolved,
More informationGLG Chapter 7 Sedimentary Environments & Rocks
GLG 101 - Chapter 7 Sedimentary Environments & Rocks Name Note, Oct 11: I ll be writing this study sheet over the next few days. Each day I will add questions until the entire chapter is done, hopefully
More informationObjectives. Introduction to Soils. Terms to know: What is soil? Study of Soils. The Soil Body 11/9/2012
Objectives Explain what soil is and where it comes from Define a soil body List examples of the five soil-forming factors Explain how soils develop Introduction to Soils Terms to know: What is soil? Alluvial
More informationWeathering, Erosion, Deposition, and Landscape Development
Weathering, Erosion, Deposition, and Landscape Development I. Weathering - the breakdown of rocks into smaller particles, also called sediments, by natural processes. Weathering is further divided into
More informationSummary. Streams and Drainage Systems
Streams and Drainage Systems Summary Streams are part of the hydrologic cycle and the chief means by which water returns from the land to the sea. They help shape the Earth s surface and transport sediment
More information1/6/ th Grade Earth s Surface. Chapter 3: Erosion and Deposition. Lesson 1 (Mass Movement)
Lesson 1 (Mass Movement) 7 th Grade Earth s Surface Chapter 3: Erosion and Deposition Weathering the chemical and physical processes that break down rock at Earth s surface Mechanical weathering when rock
More informationThe San Benito Gravels: Fluvial Depositional Systems, Paleocurrents, and Provenance
ES120 FIELD TRIP #2 10 April 2010 NAME: The San Benito Gravels: Fluvial Depositional Systems, Paleocurrents, and Provenance Introduction The San Benito Gravels (SBG) consists of a 500 m thick section of
More informationPratice Surface Processes Test
1. The cross section below shows the movement of wind-driven sand particles that strike a partly exposed basalt cobble located at the surface of a windy desert. Which cross section best represents the
More information