COMPO- SITION. Euhedral skeletal. Twinned, zoned. Euhedral. Calcic. Anhedral. Mafic. brown clay.

Save this PDF as:
 WORD  PNG  TXT  JPG

Size: px
Start display at page:

Download "COMPO- SITION. Euhedral skeletal. Twinned, zoned. Euhedral. Calcic. Anhedral. Mafic. brown clay."

Transcription

1 SITE 9-9A-24X-CC (Piece,-2 cm) ROCK NAME: Basaltic vitrophyre. GRAIN : y to 2.2 mm. TEXTURE: Spherulitic; microporphyritic; subophitic. WHERE SAMPLED: At top of contact with volcaniclastic. Green clay Zeolites or vesicles. Vein Anhedral. Mafic. Euhedral skeletal. Twinned, zoned. Most is devitrified. Yellow to clove-brown glass remains in the center of some spherulites. Spherulites have altered to clays. Bright green; interstitial to spherulites. Zoned; vein is lined with green clays. Vein 2 Zeolites; green to brown clay. Perpendicular to contact, : Some of the more altered glass was removed during thin section preparation. The altered basaltic vitrophyre is in contact with a felsic volcaniclastic. Angular feldspars are in a very fine-grained matrix containing phyllosilicates. The contact is a finely banded, sharply scalloped edge, concave upward. -9A-2X- (Piece, -4 cm) ROCK NAME: Tholeiitic basalt. GRAIN : y to.8 mm. TEXTURE: Microporphyritic; subophitic; intersertal. WHERE SAMPLED: Iceland Plateau; pillow interior. 2 4 ^ Green clay Orange clay 2-4 < Bladed. Subhedral, tabular. Subhedral. Skeletal, euhedral. One grain is present and it is partially plucked. Interlayered with. Some is altered. Present also as plumose sheaves. Tabular, anhedral, and equant. Partially sericitized. Ilmenite and magnetite are present. Some is replacing interstitial s or glass. Completely altered; apparently variable in composition. Found only in strip at edge of thin section. Strong resemblance to iddingsite. It is probably best described as a oid. Fibrous, often radiating or axiolitic. Cavity <2 At edge of second section. Spherical. Best seen in thin section chip. Spherical. Two coalesced nearly spherical cavities. Perhaps are vesicles. : in "groundmass" is partially altered to a very fine-grained material (Mg-amphibole?). Edge of thin section contains a strip of altered material where intersertal glass has altered to brilliant olive green and orange fibrous clay 88

2 SITE 9-9A-2X- (Piece A, -6 cm) GRAIN : y to 2. mm. TEXTURE: Microporphyritic; subophitic; glomeroporphyritic. WHERE SAMPLED: Center of pillow, away from vesicles. Altered olivine -4 Silica <. <.-.2 In amygdules and in veins. and olivine. Replacing quenched clinopyroxene. Euhedral to anhedral. Euhedral to subhedral. Euhedral tabular. Euhedral, skeletal. Found in clots with. Found in clots of only or of and clinopyroxene. Completely altered to fibrous brown s and iron-oxide Tabular and plumose. Larger grains are fresh. Plumose sheaves are partially altered. Zoned, very fresh. Magnetite and ilmenite are present, with no secondary titanite. Generally in amygdules with a green clay. Granular to fibrous. Cryptocrystalline and granular with first order birefringence. Always found with fibrous radiating brown clay. Possibly opal or chalcedony. Vein Void to.8.-. Clay or empty.. and a a green clay. Irregularly shaped and spherical. Irregularly shaped. Amygdaloidal. -2 cm long; 2 present. : Groundmass is mostly radiating sheaves of quenched pyroxene altering to an unknown, possibly actinolite. -9A-2X- (Piece, 8-84 cm) WHERE SAMPLED: Iceland Plateau; massive pillow center. GRAIN : y to 2 mm. TEXTURE: Subophitic; quenched; microporphyritic. Brown Mineraloid Sericite? Chalcedony Replacing glass and in amygdules.... Subhedral; equant. Subhedral to tabular. Subhedral skeletal. Skeletal to euhedral. Zoned. Fresh; one grain present. Completely altered to brown fibrous Rims and cores are compositionally distinct. Some are platy, some are skeletal with altered melt inclusions. Some of the smaller grains are altered. Intergrown with. Ilmenite and magnetite. Some is cryptocrystalline (devitrified glass). Completely altered to brown clay s and iron-oxide Euhedral cubes, generally clustered. Probably several different s; fibrous; different rims and cores. Always with brown clay in interstices. Possibly an amphibole, but granular and very finegrained. : Identification of olivine is tenuous because the alteration product is so similar to the alteration product of intersertal glass. It is difficult to tell whether the is altering or whether inclusions in have altered.

3 SITE 9-9A-2X- (Piece, 8-9 cm) ROCK NAME: Slightly aphyric basaltic vitrophyre. GRAIN : y to. mm. TEXTURE: Vesicular; glomeroporphyritic; spherulitic. WHERE SAMPLED: Iceland Plateau; in glassy pillow rind. 8 6 Iron oxide - 6 and vesicles <O.l Intermediate. Mafic. Tabular; skeletal; euhedral. Subhedral. Skeletal. Spherulitic. Twinned. Clustered skeletal grains. Altered to brown clay s and iron oxides. Altered spherulites are dark brown and are surrounded by yet a darker brown material. Fracture Even..-. -l Yellow and brown clay None. Spheroidal to irregular. Most are plucked of the fibrous filling. Lined with a mustard-yellow, fibrous clay, which is perhaps an altered glass. : Spherulites and surrounding matrix have been completely altered to palagonite or a smectite. -9A-2X-2 (Piece C, cm) WHERE SAMPLED: Iceland Plateau; pillow center. GRAIN : y to 2 mm. TEXTURE: Variolitic (radiating; plumose); micro-glomeroporphyritic; subophitic; intersertal.? Clay Veins; interstitial areas Bladed skeletal. Skeletal tabular. Skeletal, euhedral. Euhedral, skeletal. Mostly fresh. Intergrown with pyroxene. Some sericitization. Fresh. inclusions. Completely altered to brown and tan fine-grained fibrous and granular material along with an iron-oxide. Ilmenite and magnetite. Contain altered melt inclusions, clinopyroxene inclusions, and are partially sericitized. Almost completely altered to brown clay s and a colorless granular. Altered to brown material. Colorless and granular. Edge of slide.. and brown clay. Irregular. Have mostly been plucked of clays. : Distinctive domains throughout thin section where grain size increases or where a trachytic texture is well developed. 88

4 SITE 9-9A-2X-2 (Piece B, - cm) GRAIN : y to 2. mm. TEXTURE: Micro-glomeroporphyritic; subophitic; quenched; variolitic. WHERE SAMPLED: Iceland Plateau; pillow center. Chalcedony Vein; segregated melt.. and olivine Anhedral. Anhedral. Skeletal, zoned. Skeletal; anhedral. Skeletal or equant. Devitrified. Quenched; intergrown with clinopyroxene. Swallowtails present. Zoned; cores are browner. Swallowtails common. Contain pyroxene cores. Colorless to yellow-brown. Plumose crystals are slightly altered. Some contain opaque inclusions. Mostly magnetite, but ilmenite is common. Fresh grains could be "hidden" in the groundmass; however, most are completely altered. Some fresh glass could remain in the quenched pockets. Most is altered to a brownish clay (s). Is perhaps primary in the immiscible melt droplets. Circular, radiating features. Plumose, quenched sheaves altering to unknown that is perhaps amphibole..2-., quenched crystals, and clay. Spherical laths wrapped around periphery. Quenched feldspar and opaque in altered(?) glass, commonly with a large core of pyrite. Probably an immiscible melt segregation. : Pods of quenched glass containing skeletal opaque s, clinopyroxene, and reach. mm in diameter. Some glass may remain. Phenocrysts are best described as microphenocrysts. -9A-2X-2 (Piece, 42-4 cm) GRAIN : to. mm. TEXTURE: Microporphyritic; subophitic; variolitic. WHERE SAMPLED: Iceland Plateau; towards pillow center. Mineral clay s Fracture Amygdules/vesicles. Vein Euhedral, broken. Glomeroporphyritic in places. Zoned. Poikilitic, Poikilitic grains are few, are intergrown subhedral. with and may be xenocrystic. Equant and euhedral. In a clot with clinopyroxene and. Bladed, skeletal. Bladed, skeletal. Equant, euhedral. Devitrified. Spherical. Spherical. Swallowtails are common. Plumose grains are beginning to alter and are intergrown with crystals. Some skeletal. Probably magnetite and ilmenite. Completely altered; zoned. Dark and light brown fibrous; cracked and plucked. Colorless, green, and brown; fibrous. Fibrous; darker at the edge. Very fine-grained, perhaps amphibole. Plucked. : The plumose clinopyroxene may not be very altered. It is intimately intergrown with needles, therefore more than % clinopyroxene could still be present.

5 SITE 9-9A-26X- (Piece, -6 cm) GRAIN : y to. mm. TEXTURE: Spherulitic; vitrophyric; microporphyritic; fractured..2-. Orange-red clay Green clay Green/brown clay < Mafic. Veins and vesicles. Veins and vesicles. Spherulites... WHERE SAMPLED: Iceland Plateau; glassy rind. Twinned. Euhedral, skeletal. Euhedral or equant. Bladed; skeletal. Skeletal; tabular. Some within the glassy portion are slightly altered. Some are zoned. Iddingsite. Interleaved with altered pyroxene(?). Plumose crystals are altered. Completely altered to brown clay and iron-oxide Dark brown fraction could be partially devitrified, but not discernibly so. % is devitrified (spherulitic with microlites). Bright green, often rimming orange clay In crystallized part of thin section. May be replacing something other than clinopyroxene. Amygdules 8 Even Clays, opaque Clay s and opaque Irregular to spherical. Spherical to irregular. In the glassy section, vesicles are clayfilled. In the crystallized section, "vesicles" are melt segregations with quenched iron-oxide s and brown clay : Groundmass contains radiating, plumose structures: fine-grained tablets and a very fine-grained birefringent. It is possibly altered pyroxene considering the textures seen in several of the other units. However, it is difficult to distinguish altered plumose pyroxene from altered spherulites in this section. Section ranges from cracked and hydrated glass to devitrified glass, a quenched groundmass with quenched crystals, and the groundmass typical of pillow centers.

6 SITE 9-9A-26X- (Piece 6, -8 cm) GRAIN : y to 2. mm. TEXTURE: Microporphyritic; variolitic; subophitic; glomeroporphyritic. WHERE SAMPLED: Iceland Plateau; center of pillow. Green clay Red oid Colorless clay ?? 4-. ; vesicles. ; pyroxene <O.Ol-O.l.-.2 Amygdules; glass; olivine. Amygdules. Vein; glass. Euhedral, bladed. Zoned. Corroded/resorbed. No sieve-textured grains. Euhedral-anhedral. Usually with laths. Completely altered; zoned. Subhedral tabular. Also as radiating slender crystals intergrown with pyroxene. Euhedral, skeletal. Probably magnetite and ilmenite. Equant or plumose. The two apparent habits seem odd: small and euhedral (.2 mm) or plumose (variolitic?). Well-preserved pyroxene grades into the plumose very fine material, so at least in many instances, the pyroxene was perhaps quenched to form plumose sheaves. Zoned, with iron-oxide rims. Completely altered to brown and green clay plus iron-oxide Devitrified. Altered to brown clay and perhaps devitrified to the plumose fibrous or acicular material. The acicular, radiating sheaves could also be altered pyroxene. Bright green clay: chlorite or celadonite. Resembles iddingsite. Disseminated along a vein, and replacing intersertal glass. Grainy, often surrounded by brown fibrous clay, or lining a vesicle. Relief suggests a pyroxene or amphibole, rather than a clay. Vein Green and red clay.. Spherical. Comprised of disseminated pyrite grains, : Groundmass is devitrified. The plumose radiating sheaves in the groundmass are either altering devitrification products or altering pyroxene. The abundance of finegrained opaque s is indicative of devitrification. 89

7 SITE 9-9A-26X- (Piece A, 8-89 cm) GRAIN : y to. mm. TEXTURE: Microporphyritic; subophitic; variolitic. WHERE SAMPLED: Iceland Plateau; pillow interior. Sericite Chalcedony ? -2 < -2 Amygdules... /olivine. Pyroxene <.2-. Anhedral- Equant grains are possibly xenocrysts. Anhedral. Some poikilitically enclose clinopyroxene. Zone Skeletal tabular. Swallowtails are common. Melt inclusions and some sericitization are in cores. Euhedral-Anhedral. Mostly fresh, but beginning to alter. Equant to oblong. Euhedral-skeletal. Probably magnetite and ilmenite present. In clots with brown clay. Radiating fibers, always found in brown clay. Very fine-grained. Amygdules Brown Clay. and pyrite. Irregular. Vein of altered glass. : One of the least-altered rocks recovered. -9A-26X-2 (Piece IB, 6- cm) GRAIN : y to. mm. TEXTURE: Vesicular; variolitic; microporphyritic. WHERE SAMPLED: Iceland Plateau; center of small pillow. Green Clay Iron Oxide Brown Clay Brown Clay ? 2- -, glass., olivine.. Devitrified glass Skeletal tabular. Euhedral tabular. Skeletal. Skeletal tabular. Zoned, with more calcic cores. In radiating clots with clinopyroxene. Twinned. Probably all magnetite. Devitrified/spherulitic. Spherulites have altered to a brown clay. In vesicles with orange clay. Hematite or iddingsite. Diagenetic or hydrothermally altered devitrified glass.. Brown and green clay Spherical. Plucked. : Orange glass remains, interstitial to spherulites. Most of the glass devitrified to spherulites and fine-grained iron-oxide The spherulites have been replaced by or hydrated and baked to a dark brown clay that is perhaps a chlorite. 89

8 SITE 9-9A-26X-2 (Piece A, 6-9 cm) GRAIN : y to 2. mm. TEXTURE: Subophitic; variolitic; vesicular. WHERE SAMPLED: Iceland Plateau; center of pillow ? Groundmass; vesicles; vein... Euhedral-subhedral Tabular. Skeletal. Ovoid. Equant; euhedral. Tabular; plumose. Zoned. Intergrown with clinopyroxene. Slightly altered. Some alteration. Probably magnetite. Some alteration of plumose clinopyroxene sheaves, particularly in "cores." Disseminated around vesicles and along a Some of this could be an alteration produc feldspar or glass. It is difficult to discern. It is probably a poorly formed amphibole..8-. Quenched Spherical Contains quenched iron-oxide s, melt. to irregularly clinopyroxene, and in addition shaped. to brown clay. Fracture None. is disseminated along the fracture. : It is very difficult to distinguish altered olivine from what may be pockets of altered glass. 892

Page 499 PERCENT PRESENT. SIZE (mm) PERCENT ORIGINAL COMPO- SITION MORPHOLOGY COMMENTS

Page 499 PERCENT PRESENT. SIZE (mm) PERCENT ORIGINAL COMPO- SITION MORPHOLOGY COMMENTS 168-1025B-11X-CC (Piece 2, 028-040 cm) ROCK NAME: Aphyric plagioclase-pyroxene-olivine basalt GRAIN SIZE: Aphanitic: microcrystalline TEXTURE: Sheaf-spherulitic to intersertal. SIZE (mm) Olivine Tr Tr

More information

MORPHOLOGY COMMENTS. Saponite Tr Vesicles Forms an inner lining of some vesicles. FILLING SHAPE COMMENTS:

MORPHOLOGY COMMENTS. Saponite Tr Vesicles Forms an inner lining of some vesicles. FILLING SHAPE COMMENTS: 168-1023A-22X-CC (Piece 4, 034-040 cm) ROCK NAME: Sparsely to moderately plagioclase-olivine phyric basalt GRAIN SIZE: Aphanitic: microcrystalline to cryptocrystalline TEXTURE: Variolitic to subvariolitic;

More information

SECTION 5: THIN SECTIONS

SECTION 5: THIN SECTIONS SECTION 5: THIN SECTIONS 142-864A-1M-01 (0-10 cm) OBSERVER: BR GRAIN : Microcrystalline. TEXTURE: Spherulitic (variolitic) to microlitic (no glass). WHERE SAMPLED: Unit 1 COMPO srnon 0.2-1 mm Euhedral,

More information

Textures of Igneous Rocks

Textures of Igneous Rocks Page 1 of 6 EENS 212 Prof. Stephen A. Nelson Petrology Tulane University This document last updated on 12-Feb-2004 Introduction to Igneous Rocks An igneous rock is any crystalline or glassy rock that forms

More information

What is the Workflow for Hard Rock Visual Core Description and How Will it Benefit from CoreWall?

What is the Workflow for Hard Rock Visual Core Description and How Will it Benefit from CoreWall? What is the Workflow for Hard Rock Visual Core Description and How Will it Benefit from CoreWall? Clive R. Neal Department of Civil Eng. & Geological Sciences, University of Notre Dame, Notre Dame, IN

More information

Lithology: Olivine-rich gabbro medium grained Observer: Texture: granular Ave. grain size: medium grained [345] Shape Habit Comments

Lithology: Olivine-rich gabbro medium grained Observer: Texture: granular Ave. grain size: medium grained [345] Shape Habit Comments THIN SECTION LABEL ID: 179-1105A-1R-2-W 88/91-TSB-TSS Piece no.: #02 TS no.: Igneous Medium-grained olivine gabbronorite; plagioclase chadacryst within orthopyroxene oikocryst; rims of olivine and clinopyroxene

More information

This work follows the international standard nomenclature (IUGS) in naming the

This work follows the international standard nomenclature (IUGS) in naming the CHAPTER FIVE: PETROGRAPHY This work follows the international standard nomenclature (IUGS) in naming the different Platreef rock types. It should be noted that new lithologies not described in chapter

More information

Name Petrology Spring 2006

Name Petrology Spring 2006 Igneous rocks lab Part I Due Tuesday 3/7 Igneous rock classification and textures For each of the rocks below, describe the texture, determine whether the rock is plutonic or volcanic, and describe its

More information

Core Photo. CORE DESCRIPTIONS VISUAL CORE DESCRIPTIONS, SITE A-2R message openfile IMAGES/1136A2R.PDF 1136A-1R NO RECOVERY ACCESSORIES

Core Photo. CORE DESCRIPTIONS VISUAL CORE DESCRIPTIONS, SITE A-2R message openfile IMAGES/1136A2R.PDF 1136A-1R NO RECOVERY ACCESSORIES VISUAL, SITE 1136 1 1136A-R message openfile IMAGES/1136AR.PDF Core Photo Site 1136 Hole A Core R Cored 4.7-14.4 mbsf 9METERS 8 7 6 5 4 3 1 SECTION 1 3 4 5 6 7 8 GRAPHIC LITH. BIOTURB. STRUCTURE ACCESSORIES

More information

Mineral/feature Modal% Size, morphology, distinguishing optical properties

Mineral/feature Modal% Size, morphology, distinguishing optical properties Sample#: FIL 10-1 Rock Name: Olivine bearing, vesiculated 2-Px basaltic andesite Hand-specimen description: Highly porphyritic and vesiculated (1-5mm) medium-grained dark grey groundmass with abundant

More information

COMMENTS COMMENTS. 40% associated with Fe-oxides. COMMENTS. In dense, fine-grained silica. COMMENTS COMMENTS

COMMENTS COMMENTS. 40% associated with Fe-oxides. COMMENTS. In dense, fine-grained silica. COMMENTS COMMENTS 18-97A-3X-1 (Piece 9, 4^16 cm) Thin section: #1 ROCK NAME: RED CHERT (Type ) Marcasite

More information

Igneous petrology EOSC 321

Igneous petrology EOSC 321 Igneous petrology EOSC 321 Laboratory 1: Review of optical properties of minerals. Ultramafic plutonic and volcanic rocks Material Needed: a) Microscope, b) Glossary of rock names and textures (see Pages

More information

Igneous petrology EOSC 321 Laboratory 1: Ultramafic plutonic and volcanic rocks

Igneous petrology EOSC 321 Laboratory 1: Ultramafic plutonic and volcanic rocks 1 Igneous petrology EOSC 321 Laboratory 1: Ultramafic plutonic and volcanic rocks Material Needed: a) Microscope, b) Glossary of rock names and textures (see Pages 24-25 and 43 of Winter); c) Lab1 Manual

More information

Textural Terms in Igneous Petrology

Textural Terms in Igneous Petrology Textural Terms in Igneous Petrology Adcumulate - Cumulus crystals continue to grow and displace the intercumulus liquid. Example: Opx adcumulate texture with minor interstitial chromite and plagioclase

More information

Geodiversity Research Centre, Australian Museum, Sydney, NSW 2010, Australia.

Geodiversity Research Centre, Australian Museum, Sydney, NSW 2010, Australia. Cumulate-rich xenolith suite in Late Cenozoic basaltic eruptives, Hepburn Lagoon, Newlyn, in relation to western Victorian lithosphere F. L. SUTHERLAND 1, J. D. HOLLIS 2, W. D. BIRCH 3, R. E. POGSON 1

More information

Hole 340-U1393A-1H Section 1, Top of Section: 0.0 CSF-A (m)

Hole 340-U1393A-1H Section 1, Top of Section: 0.0 CSF-A (m) Hole 4-U9A-H Section, Top of Section:. CSF-A (m) Dark volcaniclastic coarse to very coarse sand, with rare granules (up to 4 mm), mainly andesitic lava with rare carbonate grains. Similar in composition

More information

Igneous petrology EOSC 321

Igneous petrology EOSC 321 Igneous petrology EOSC 321 Laboratory 2: Determination of plagioclase composition. Mafic and intermediate plutonic rocks Learning Goals. After this Lab, you should be able: Determine plagioclase composition

More information

WAMUNYU EDWARD MUREITHI I13/2358/2007

WAMUNYU EDWARD MUREITHI I13/2358/2007 WAMUNYU EDWARD MUREITHI I13/2358/2007 Olkaria geothermal area is situated south of Lake Naivasha on the floor of the southern segment of the Kenya rift. The geology of the Olkaria Geothermal area is subdivided

More information

LITHOLOGIC DESCRIPTION. VOLCANIC SAND, MUDDY SILICEOUS OOZE, GRAVEL, SANDY CLAY, and BASALT PEBBLES

LITHOLOGIC DESCRIPTION. VOLCANIC SAND, MUDDY SILICEOUS OOZE, GRAVEL, SANDY CLAY, and BASALT PEBBLES SITE 73 HOLE B CORE D CORED INTERVAL 4878.3-4886.3 mbsl; 0.0-8.0 mbsf U BIOSTRAT. ZONE/ FOSSIL CHARACTER GRAPHIC LITHOLOGY LITHOLOGIC DESCRIPTION VOLCANIC SAND, MUDDY SILICEOUS OOZE, GRAVEL, SANDY CLAY,

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

Igneous petrology EOSC 321 Laboratory 4: Intermediate and Felsic Volcanic Rocks. Pyroclastic Rocks

Igneous petrology EOSC 321 Laboratory 4: Intermediate and Felsic Volcanic Rocks. Pyroclastic Rocks Igneous petrology EOSC 321 Laboratory 4: Intermediate and Felsic Volcanic Rocks. Pyroclastic Rocks Duration: This lab is to be completed within the lab period. The results will be evaluated and returned

More information

Advanced Igneous petrology EOSC 530 Laboratory 1: Mantle Xenoliths

Advanced Igneous petrology EOSC 530 Laboratory 1: Mantle Xenoliths EOSC 530 Labs 1 Instructor: Kopylova Advanced Igneous petrology EOSC 530 Laboratory 1: Mantle Xenoliths Introduction: Upper mantle rocks can be found in ultramafic massifs or as xenoliths in basalts and

More information

Chapter - IV PETROGRAPHY. Petrographic studies are an integral part of any structural or petrological studies in

Chapter - IV PETROGRAPHY. Petrographic studies are an integral part of any structural or petrological studies in Chapter - IV PETROGRAPHY 4.1. Introduction Petrographic studies are an integral part of any structural or petrological studies in identifying the mineral assemblages, assigning nomenclature and identifying

More information

Objectives of this Lab. Introduction. The Petrographic Microscope

Objectives of this Lab. Introduction. The Petrographic Microscope Geological Sciences 101 Lab #9 Introduction to Petrology Objectives of this Lab 1. Understand how the minerals and textures of rocks reflect the processes by which they were formed. 2. Understand how rocks

More information

WHERE SAMPLED: MORPHOLOGY Anhedral. Rounded. Euhedral to interstitial Anhedral. Elongate, subangular SHAPE

WHERE SAMPLED: MORPHOLOGY Anhedral. Rounded. Euhedral to interstitial Anhedral. Elongate, subangular SHAPE 47-89A-R- (Piece, 7-0 cm) GRAIN : Medium OBSERVER: JAY WHERE SAMPLED: Sulfide minerals 0. 7.8 0.9 0. 8.. 0.9 to to 4 0. Rounded Euhedral to interstitial Elongate, subangular Pervasively serpentinized with

More information

A-13R-CC (24-25 cm) No. 38 OBSERVER: SKE, RUB, MAN, BES ROCK NAME: Amphibolite. GRAIN SIZE: Medium-grained. TEXTURE: Elongated amphibole

A-13R-CC (24-25 cm) No. 38 OBSERVER: SKE, RUB, MAN, BES ROCK NAME: Amphibolite. GRAIN SIZE: Medium-grained. TEXTURE: Elongated amphibole 173-1067A-13R-CC (24-25 cm) No. 38 OBSERVER: SKE, RUB, MAN, BES ROCK NAME: Amphibolite. TEXTURE: Elongated amphibole grains displaying preferred orientation. NAME MODE (%) SIZE (mm) SHAPE COMMENTS Amphibole

More information

Laboratory 7: Alkaline rocks

Laboratory 7: Alkaline rocks Laboratory 7: Alkaline rocks Learning Goals. After this Lab, you should be able: Identify the key rock-forming minerals in alkaline rocks Identify textures of alkaline rocks in thin sections Name alkaline

More information

7. SITE PRINCIPAL RESULTS. Shipboard Scientific Party 2

7. SITE PRINCIPAL RESULTS. Shipboard Scientific Party 2 Christie, D.M., Pedersen, R.B., Miller, D.J., et al., 2001 Proceedings of the Ocean Drilling Program, Initial Reports Volume 187 7. SITE 1156 1 Shipboard Scientific Party 2 PRINCIPAL RESULTS Site 1156

More information

1 INTRODUCTION. Abdullah R. Sonbul

1 INTRODUCTION. Abdullah R. Sonbul Harmful Materials in Scoria Lightweight Aggregates, Harrat Rahat, Al Akhal area, South of Al Madinah Al Monawarah, West Central Arabian Shield, Saudi Arabia. Abdullah R. Sonbul Abstract-The study aims

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

Chapter 3: Igneous Textures

Chapter 3: Igneous Textures Chapter 3: Igneous Textures Questions to be considered? - What textures may be produced as magma cools and crystallizes to form igneous rocks? What physical variables control the development of igneous

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

Igneous petrology EOSC 321 Laboratory 8: Intermediate and Felsic Volcanic Rocks. Pyroclastic Rocks

Igneous petrology EOSC 321 Laboratory 8: Intermediate and Felsic Volcanic Rocks. Pyroclastic Rocks 321 Lab 8 Instructor: L. Porritt - 1 - Igneous petrology EOSC 321 Laboratory 8: Intermediate and Felsic Volcanic Rocks. Pyroclastic Rocks Learning Goals. After this Lab, you should be able: Identify fine-grained

More information

20. AGE DETERMINATIONS ON IGNEOUS ROCKS IN HOLE 373A

20. AGE DETERMINATIONS ON IGNEOUS ROCKS IN HOLE 373A 2. AGE DETERMINATIONS ON IGNEOUS ROCKS IN HOLE 373A 2.1. POTASSIUMARGON AGE DETERMINATION OF BASALT SAMPLES FROM LEG 42A, HOLE 373A, CORE 7 H. Kreuzer, M. Mohr, and I. Wendt, Bundesanstalt für Geowissenschaften

More information

GSA Data Repository: Three styles of diamond resorption in a single kimberlite

GSA Data Repository: Three styles of diamond resorption in a single kimberlite GSA Data Repository 2017286 Fedortchouk et al., 2017, Three styles of diamond resorption in a single kimberlite: Effects of volcanic degassing and assimilation: Geology, doi:10.1130/g39066.1. 1 2 3 4 5

More information

Sphene (Titanite) Plane polarized light. Honey brown/orange Wedge-shaped crystals

Sphene (Titanite) Plane polarized light. Honey brown/orange Wedge-shaped crystals Sphene (Titanite) Plane polarized light Honey brown/orange Wedge-shaped crystals Sphene (Titanite) Crossed nicols High-order, washedout interference colors (light orange) #1 Rule for (Heavy) Radiogenic

More information

APHYRIC BASALTS Petrography. Present address: Dept, of Geol. and Geog., Univ. of Massachusetts,

APHYRIC BASALTS Petrography. Present address: Dept, of Geol. and Geog., Univ. of Massachusetts, 20. THE PETROGRAPHY, MINERAL CHEMISTRY, AND ONE-ATMOSPHERE PHASE RELATIONS OF BASALTS FROM SITE 395 Michael A. Dungan and Philip E. Long, NRC Resident Research Associate, NASA Johnson Space Center, Houston,

More information

Petrographic Investigation of Two Float Samples from the Goldstake Property, Northern Ontario. Prepared for: Mr. Robert Dillman

Petrographic Investigation of Two Float Samples from the Goldstake Property, Northern Ontario. Prepared for: Mr. Robert Dillman Petrographic Investigation of Two Float Samples from the Goldstake Property, Northern Ontario Prepared for: Mr. Robert Dillman by Jim Renaud Renaud Geological Consulting Ltd. 21272 Denfield Road London,

More information

TEXTURES OF IGNEOUS ROCKS

TEXTURES OF IGNEOUS ROCKS TEXTURES OF IGNEOUS ROCKS Today, Geologist working with igneous rocks has to apply a wide range of skills, including the analysis of field relationships, hand specimen identification in the field, description

More information

CHAPTER IV PETROGRAPHY

CHAPTER IV PETROGRAPHY CHAPTER IV PETROGRAPHY IV.1 Introduction : Owing to their complex and hybrid nature, kimberlites display a prominent and typical inequigranular texture wherein large roundedto-anhedral crystals are found

More information

Davis, E.E., Fisher, A.T., Firth, J.V., et al., 1997 Proceedings of the Ocean Drilling Program, Initial Reports, Vol. 168

Davis, E.E., Fisher, A.T., Firth, J.V., et al., 1997 Proceedings of the Ocean Drilling Program, Initial Reports, Vol. 168 Davis, E.E., Fisher, A.T., Firth, J.V., et al., 1997 Proceedings of the Ocean Drilling Program, Initial Reports, Vol. 168 6. BURIED BASEMENT TRANSECT (SITES 128, 129, 13, 131, AND 132) 1 Shipboard ScientiÞc

More information

GEOLOGY 333 LAB 5. Light Mechanics

GEOLOGY 333 LAB 5. Light Mechanics GEOLOGY 333 LAB 5 OPTICAL MICROSCOPY & MINERALS IN THIN SECTION Light Mechanics Light Waves: Visible light travels in waves, which have measurable wavelengths, frequencies, and velocities Wavelength (

More information

27. PETROGRAPHY OF BASALTS FROM DEEP SEA DRILLING PROJECT LEG Marjorie S. Goldfarb, School of Oceanography, University of Washington 2

27. PETROGRAPHY OF BASALTS FROM DEEP SEA DRILLING PROJECT LEG Marjorie S. Goldfarb, School of Oceanography, University of Washington 2 27. PETROGRAPHY OF BASALTS FROM DEEP SEA DRILLING PROJECT LEG 92 1 Marjorie S. Goldfarb, School of Oceanography, University of Washington 2 ABSTRACT Studies of thin sections of basalts from Sites 597,

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

LITHOLOGY REPORT - Detailed -

LITHOLOGY REPORT - Detailed - (m) (m) Lithology Sample # Length 50 0.00 11.76 10 Casing Minor Interval: 0.00 0.54 10A Casing above ground (Air) 0.54 11.76 10G Casing through gravel or overburden (Ground) 11.76 40.80 1c Interbedded

More information

Introduction & Textures & Structures of Igneous Rocks

Introduction & Textures & Structures of Igneous Rocks Page 1 of 14 EENS-2120 Petrology Prof. Stephen A. Nelson Introduction & Textures & Structures of Igneous Rocks This document last updated on 08-Jan-2015 Petrology & Petrography Petrology - The branch of

More information

13. PETROLOGY OF BASALTS FROM DEEP SEA DRILLING PROJECT, LEG 38

13. PETROLOGY OF BASALTS FROM DEEP SEA DRILLING PROJECT, LEG 38 . PETROLOGY OF BASALTS FROM DEEP SEA DRILLING PROJECT, LEG W.I. Ridley, M.R. Perfit, and ML. Adams, LamontDoherty Geological Observatory, Columbia University, Palisades, New York INTRODUCTION We have determined

More information

Sedimentation & Stratigraphy. Lab 3: Heavy Mineral Analysis Using the Franz Magnetic Separator

Sedimentation & Stratigraphy. Lab 3: Heavy Mineral Analysis Using the Franz Magnetic Separator Sedimentation & Stratigraphy Name I. Introduction Lab 3: Heavy Mineral Analysis Using the Franz Magnetic Separator In Lab 2, we used sand size-distributions to determine if the sediments were derived from

More information

Core Photo. Site 1111 Hole A Core 2R Rec. 0.73% mbsf

Core Photo. Site 1111 Hole A Core 2R Rec. 0.73% mbsf VISUAL CORE DESCRIPTIONS, SITE 1111 1 1111A-2R message openfile IMAGES/1111A2R.PDF 1111A-1R NO RECOVERY Site 1111 Hole A Core 2R Rec. 0.73% 10.1-19.7 mbsf GRAIN SIZE METERS 1 SECTION granule very coarse

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

Rock Identification. Aphanitic Texture (fine grained) Individual crystals are so small that they are not visible to the naked eye

Rock Identification. Aphanitic Texture (fine grained) Individual crystals are so small that they are not visible to the naked eye The Identification of Rocks This lab introduces the identification of igneous, sedimentary and metamorphic rocks based on mineralogy (composition) and texture. I. Classification of Igneous Rocks Textures

More information

GEOLOGY. Subject : GEOLOGY (For under graduate student.) Paper No. : Paper 02 Introduction to Geology 02

GEOLOGY. Subject : GEOLOGY (For under graduate student.) Paper No. : Paper 02 Introduction to Geology 02 GEOLOGY Subject : GEOLOGY (For under graduate student.) Paper No. : Paper 02 Introduction to Geology 02 Topic No. & Title : 42 Texture of Igneous Rocks (Part 01) Academic Script Introduction The first

More information

24. CRYSTAL MORPHOLOGIES IN BASALTS DREDGED AND DRILLED FROM THE EAST PACIFIC RISE NEAR 9 N AND THE SIQUEIROS FRACTURE ZONE 1

24. CRYSTAL MORPHOLOGIES IN BASALTS DREDGED AND DRILLED FROM THE EAST PACIFIC RISE NEAR 9 N AND THE SIQUEIROS FRACTURE ZONE 1 24. CRYSTAL MORPHOLOGIES IN BASALTS DREDGED AND DRILLED FROM THE EAST PACIFIC RISE NEAR 9 N AND THE SIQUEIROS FRACTURE ZONE 1 James H. Natland, Deep Sea Drilling Project, Scripps Institution of Oceanography,

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

Lunar Glossary. Note to the User: Glossary

Lunar Glossary. Note to the User: Glossary Lunar Glossary Note to the User: A number of terms are unique to lunar science or are at least used in a specialized sense. The following brief glossary is an attempt to define these unique terms plus

More information

Lab 4: Mineral Identification April 14, 2009

Lab 4: Mineral Identification April 14, 2009 Name: Lab 4: Mineral Identification April 14, 2009 While about 3000 minerals have been recognized as valid species, very few of these are commonly seen. Comprehensive mineralogy texts typically deal with

More information

A Classification Oncoidal wackestone. Interpretation Shallow tail or channel environment.

A Classification Oncoidal wackestone. Interpretation Shallow tail or channel environment. A132 Photo 1: Matrix of micrite/ carbonaceous mud with high percentage of siliciclastic sand and silt. Shrinkage fractures partially filled with microcrystalline carbonate cement. Other small voids contain

More information

OCEAN/ESS 410. Lab 8. Igneous rocks

OCEAN/ESS 410. Lab 8. Igneous rocks Lab 8. Igneous rocks Today s exercise is an introduction to rock identification and the crustal structure of the seafloor. All rocks are composed of two or more minerals, and can be classified based on

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

67. PHASE CHEMISTRY STUDIES ON GABBRO AND PERIDOTITE ROCKS FROM SITE 334, DSDP LEG 37

67. PHASE CHEMISTRY STUDIES ON GABBRO AND PERIDOTITE ROCKS FROM SITE 334, DSDP LEG 37 67. PHASE CHEMISTRY STUDIES N GABBR AND PERIDTITE RCKS FRM SITE 334, DSDP LEG 37 R.F. Symes, J.C. Bevan, and R. Hutchison, Department of Mineralogy, British Museum (Natural History, London, England INTRDUCTIN

More information

28. COMPARISON OF THE ALTERATION AND PETROLOGY OF THE TAITAO RIDGE TO THE TAITAO OPHIOLITE 1

28. COMPARISON OF THE ALTERATION AND PETROLOGY OF THE TAITAO RIDGE TO THE TAITAO OPHIOLITE 1 Lewis, S.., Behrmann, J.H., Musgrave, R.J., and Cande, S.C. (Eds.), 1995 Proceedings of the Ocean rilling Program, Scientific Results, Vol. 141 28. COMPARISON OF THE ALTERATION AN PETROLOGY OF THE TAITAO

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

SEDIMENTOLOGY AND STRATIGRAPHY: processes, environments and deposits

SEDIMENTOLOGY AND STRATIGRAPHY: processes, environments and deposits Name GEOL 440 SEDIMENTOLOGY AND STRATIGRAPHY: processes, environments and deposits Lab #1 The Petrological Microscope: an Introduction or Refresher Purpose: The petrographic microscope is an invaluable

More information

THE FORMATION OF IDDINGSITE. A. B. Eowanls, Uniaersity of M elbourne, Auslralia.

THE FORMATION OF IDDINGSITE. A. B. Eowanls, Uniaersity of M elbourne, Auslralia. THE FORMATION OF IDDINGSITE A. B. Eowanls, Uniaersity of M elbourne, Auslralia. h.rrnooucrton fn their comprehensive paper on the origin, occurrence, composition and physical properties of the mineral

More information

47. THE MINERALOGY AND GEOCHEMISTRY OF BASALT WEATHERING, HOLES 417A AND 418Å

47. THE MINERALOGY AND GEOCHEMISTRY OF BASALT WEATHERING, HOLES 417A AND 418Å 7. THE MINERALOGY AND GEOCHEMISTRY OF BASALT WEATHERING, HOLES 7A AND 8Å Susan E. Humphris, R.N. Thompson, Department of Geology, Imperial College of Science and Technology, Prince Consort Road, London

More information

52. MINERALOGY AND GEOCHEMISTRY OF ALTERATION PRODUCTS IN HOLES 417A AND 417D BASEMENT SAMPLES (DEEP SEA DRILLING PROJECT LEG 51)

52. MINERALOGY AND GEOCHEMISTRY OF ALTERATION PRODUCTS IN HOLES 417A AND 417D BASEMENT SAMPLES (DEEP SEA DRILLING PROJECT LEG 51) 52. MINERALGY AND GECEMISTRY F ALTERATIN PRDUCTS IN LES 417A AND 417D BASEMENT SAMPLES (DEEP SEA DRILLING PRJECT LEG 51) Thierry Juteau, Yves Noack, and ubert Whitechurch, Université Louis Pasteur, Laboratoire

More information

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

Supplemental material: IDENTIFYING RECYCLED ASH IN BASALTIC ERUPTIONS D Oriano C., Bertagnini A., Cioni, R., Pompilio M.

Supplemental material: IDENTIFYING RECYCLED ASH IN BASALTIC ERUPTIONS D Oriano C., Bertagnini A., Cioni, R., Pompilio M. Supplemental material: IDENTIFYING RECYCLED ASH IN BASALTIC ERUPTIONS D Oriano C., Bertagnini A., Cioni, R., Pompilio M. Contents In this section we will show the morphological and textural features of

More information

Classification of Igneous Rocks

Classification of Igneous Rocks Igneous Textures and Their Origin Basics: Crystal sizes, Vesicles, Pyroclastic materials Nucleation and growth Zoning Secondary textures (after fully solidified) Other texture details 1 Classification

More information

GY-343 Petrology Petrographic Microscope Laboratory

GY-343 Petrology Petrographic Microscope Laboratory Introduction to the Petrographic Microscope In this laboratory you will be using the petrographic microscope to analyze thin sections of various types of igneous rocks. You will be assigned a thin section

More information

Uniaxial Minerals Descriptions

Uniaxial Minerals Descriptions Uniaxial Minerals Descriptions Look at 6 uniaxial minerals Quartz Nepheline Calcite Apatite Tourmaline Zircon Examine composition, relief, colour, form, cleavage, twinning, birefringence, occurrence Quartz

More information

ALLEGHENY COLLEGE DEPARTMENT OF GEOLOGY STUDENT HANDBOOK

ALLEGHENY COLLEGE DEPARTMENT OF GEOLOGY STUDENT HANDBOOK ALLEGHENY COLLEGE DEPARTMENT OF GEOLOGY STUDENT HANDBOOK This handbook is designed as a resource for all geology majors and minors. The material contained in the handbook includes foundation principles

More information

16 Figure J. A fresh sample of Monzonite Porphyry is depicted including biotite hornblende and plagioclase phenocrysts, biotite is altering to chlorite and plagioclase is altering to clay. (magnification

More information

Supplementary Materials for

Supplementary Materials for advances.sciencemag.org/cgi/content/full/4/5/eaar4378/dc1 Supplementary Materials for Discovery of moganite in a lunar meteorite as a trace of H2O ice in the Moon s regolith Masahiro Kayama, Naotaka Tomioka,

More information

EESC 4701: Igneous and Metamorphic Petrology IGNEOUS MINERALS LAB 1 HANDOUT

EESC 4701: Igneous and Metamorphic Petrology IGNEOUS MINERALS LAB 1 HANDOUT EESC 4701: Igneous and Metamorphic Petrology IGNEOUS MINERALS LAB 1 HANDOUT Sources: Cornell EAS302 lab, UMass Lowell 89.301 Mineralogy, LHRIC.org The Petrographic Microscope As you know, light is an electromagnetic

More information

IODP Expedition 376: Brothers Arc Flux. Site U1527 Summary. Background and Objectives

IODP Expedition 376: Brothers Arc Flux. Site U1527 Summary. Background and Objectives IODP Expedition 376: Brothers Arc Flux Site U1527 Summary Background and Objectives Site U1527 (proposed Site NWC-1A) is located on the rim of the northwest caldera wall of Brothers volcano in a water

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

Classification of Igneous Rocks

Classification of Igneous Rocks Classification of Igneous Rocks Textures: Glassy- no crystals formed Aphanitic- crystals too small to see by eye Phaneritic- can see the constituent minerals Fine grained- < 1 mm diameter Medium grained-

More information

Igneous petrology EOSC 321

Igneous petrology EOSC 321 Igneous petrology EOSC 321 Laboratory 5: Conoscopy. Felsic plutonic rocks Learning Goals. After this Lab, you should be able: Use conoscopic obervations to determine the uniaxial or biaxial character of

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

Electronic Annex for. Northwest Africa 6693: A new type of FeO-rich achondrite with low Δ17O

Electronic Annex for. Northwest Africa 6693: A new type of FeO-rich achondrite with low Δ17O Electronic Annex for Northwest Africa 6693: A new type of FeO-rich achondrite with low Δ17O Paul H. Warren1, Alan E. Rubin1, Junko Isa1, Steve Brittenham2, Insu Ahn3,4 and Byeon-Gak Choi4 1 Institute of

More information

JULlOlW M.R. #._..._..

JULlOlW M.R. #._..._.. . LOG No; I RO. ACTION: I i FILE NO: A PETROGRAPHIC STUDY OF SELECTED LITHOLOGIES AND ALTERATION STYLES ON THE SPANISH MOUNTAIN PROPERTY I I Specific Claims JULlOlW M.R. #._..._.. $... -.-.., VANCOUVER,

More information

UNIT-3 PETROLOGY QUESTIONS AND ANSWERS 1. What is mean by Rock? It is defined as natural solid massive aggregates of minerals forming the crust of the earth 2. Define Petrology? The branch of geology dealing

More information

doi: /nature09369

doi: /nature09369 doi:10.1038/nature09369 Supplementary Figure S1 Scanning electron microscope images of experimental charges with vapour and vapour phase quench. Experimental runs are in the order of added water concentration

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

PETROGENESIS OF A SERIES OF MAFIC SHEETS WITHIN THE VINALHAVEN PLUTON, VINALHAVEN ISLAND, MAINE

PETROGENESIS OF A SERIES OF MAFIC SHEETS WITHIN THE VINALHAVEN PLUTON, VINALHAVEN ISLAND, MAINE PETROGENESIS OF A SERIES OF MAFIC SHEETS WITHIN THE VINALHAVEN PLUTON, VINALHAVEN ISLAND, MAINE DANIEL HAWKINS Western Kentucky University Research Advisor: Andrew Wulff INTRODUCTION Round Point, in the

More information

Petrology of the sedimentary and igneous rocks from the Strathmore district (Sheet 57), Scotland

Petrology of the sedimentary and igneous rocks from the Strathmore district (Sheet 57), Scotland Petrology of the sedimentary and igneous rocks from the Strathmore district (Sheet 57), Scotland Integrated Geological Survey (North) Internal Report IR/04/125 BRITISH GEOLOGICAL SURVEY INTERNAL REPORT

More information

Figure 4.1 Undeformed diabase dike cutting mylonitized gabbro of Shear Zone VII. 44 Figure 4.5 Typical shear zone boundary. Unfoliated gabbro to the left, strongly foliated mylonite

More information

Notes: Note. Township of GODSON Report NQ: 12. Diamond Dniiing. Hole NQ Footage Date. July/56. July/56. Aug/56. Aug/56. Claim NQ 487' K ' l-a

Notes: Note. Township of GODSON Report NQ: 12. Diamond Dniiing. Hole NQ Footage Date. July/56. July/56. Aug/56. Aug/56. Claim NQ 487' K ' l-a Diamond Dniiing S2F«4NW«194 12 GODSON 010 Township of GODSON Report NQ: 12 Work performed by: KENNCO EXPLORATIONS (CANADA) LTD. Claim NQ Hole NQ Footage Date Note K 25434 l 487' July/56 l-a 48' July/56

More information

Supplementary Materials Detail Petrographic Description

Supplementary Materials Detail Petrographic Description Supplementary Materials Detail Petrographic Description Figure S1 shows the results of a thin section analysis of all samples from Ijen Crater. All samples had a porphyritic texture composed of plagioclase,

More information

BOREHOLE GEOLOGY AND HYDROTHERMAL MINERALISATION OF WELL HE-22, ÖLKELDUHÁLS FIELD, HENGILL AREA, SW-ICELAND

BOREHOLE GEOLOGY AND HYDROTHERMAL MINERALISATION OF WELL HE-22, ÖLKELDUHÁLS FIELD, HENGILL AREA, SW-ICELAND GEOTHERMAL TRAINING PROGRAMME Reports 2006 Orkustofnun, Grensásvegur 9, Number 17 IS-108 Reykjavík, Iceland BOREHOLE GEOLOGY AND HYDROTHERMAL MINERALISATION OF WELL HE-22, ÖLKELDUHÁLS FIELD, HENGILL AREA,

More information

MACRORYTHMIC GABBRO TO GRANITE CYCLES OF CLAM COVE VINALHAVEN INTRUSION, MAINE

MACRORYTHMIC GABBRO TO GRANITE CYCLES OF CLAM COVE VINALHAVEN INTRUSION, MAINE MACRORYTHMIC GABBRO TO GRANITE CYCLES OF CLAM COVE VINALHAVEN INTRUSION, MAINE NICK CUBA Amherst College Sponsor: Peter Crowley INTRODUCTION The rocks of the layered gabbro-diorite unit of the Silurian

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

muscovite PART 4 SHEET SILICATES

muscovite PART 4 SHEET SILICATES muscovite PART 4 SHEET SILICATES SHEET SILICATES = PHYLLOSILICATES Phyllon = leaf Large group of mineral including many common minerals: muscovite, biotite, serpentine, chlorite, talc, clay minerals Structure:

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

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: NAME PROPERTY 1 PROPERTY 2. Specimen #41: Specimen #42: (ASK!) Specimen #43: Specimen #44: Tuesday Wednesday (circle lab day)

Name: NAME PROPERTY 1 PROPERTY 2. Specimen #41: Specimen #42: (ASK!) Specimen #43: Specimen #44: Tuesday Wednesday (circle lab day) Name: Tuesday Wednesday (circle lab day) CEEES/SC 10110-20110 Planet Earth Laboratory Laboratory #3: Identification of Minerals (99 points total) Readings: Chapters 1 & 2, Laboratory Manual (from the web),

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

Semester 2, petrologi [TGS7208] 2 SKS teori 1 SKS praktikum. by: hill. gendoet hartono

Semester 2, petrologi [TGS7208] 2 SKS teori 1 SKS praktikum. by: hill. gendoet hartono Semester 2, 2017-2018 petrologi [TGS7208] 2 SKS teori 1 SKS praktikum by: hill. gendoet hartono Siklus Batuan, Kontrak Kuliah, Kelulusan, & Praktikum Magma, Diferensiasi, Viskositas, Gas dan Komposisi

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