Petro Lab Final Flashcards by Stacy Andrews

Q

Dunite

A

90% Olivine

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Q

Peridotite

A

50% Olivine, 50% Pyroxene

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Q

Pyroxenite

A

70% Pyroxene

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Q

Kimberlite

A

Green and black conglomerate

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Q

Gabbero

A

50% Plagioclase, 50% pyroxene

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Q

Basalt

A

Black, no visible crystals, pure groundmass

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Q

Diabase

A

70% plagioclase, 30% pyroxene. Elongated white in black

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Q

Anothosite

A

90% Plagioclase

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Q

Scoria

A

Non glassy volcano fizz

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Q

Basaltic Glass

A

Non obsidian glass fizz

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Q

Tektite

A

Volcanic bomb

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Q

Diorite

A

Black and white, no quartz

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Q

Andesite

A

No k-spar, only plag
Look for hornblende and pray

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Q

Syenite

A

Big k-spar crystals
No plag, only k-spar

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Q

Trachyte

A

Invisible groundmass with K-spar
Typically gray groundmass with white spar inclusions

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Q

Granite

A

Syenite + quartz
k-spar and quartz

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Q

Granodiorite

A

quartz + 1/2 plagioclase and 1/2 Alkalis

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Q

Tonolite

A

lighter, more plagioclase than anything

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Q

Monzonite

A

NO QUARTZ probably pink

Q

Rhyolite

A

Dacite but with k-spar
usually pinker

Q

Dacite

A

Invisible groundmass with k-spar and quartz

Q

Tuff

A

Pumice but with bits of rocks

Q

Pumice

A

Porous groundmass. Horrible texture

Q

Vitrophyre

A

glassy groundmass with chunks

Q

Slate

A

Flat, no crystals, clanking sound

Q

Phyllite

A

Green, foliated

Q

Schist

A

Layered, could pull apart, probably colored

Q

Gneiss

A

Striped Layers

Q

Marble

A

FIZZ light colored, visible crystals

Q

Quartzite

A

colored, fleshy vibes

Q

Hornfels

A

Sparkles under light, dimples on the side?,

Q

Skarn

A

weird and random

Q

Serpentinite

A

Non foliated Phyllite

Q

Eclogite

A

diseased rock for Christmas

Q

Breccia and co.

A

rocks mushed together

Q

Q Sandstone

A

sandy, not red

Q

Arkose

A

red sandstone

Q

Graywacke

A

gray sandstone

Q

Shale

A

thinly bedded, thunk noise

Q

Siltstone

A

layered but can feel grains

Q

mudstone

A

layered but smooth

Q

coal

A

light and black

Q

Conquina

A

Shells fused together

Q

Limestone

A

FIZZ oolitic and/or skeletal

Q

Dolostone

A

Limestone that won’t fizz unless powdered

Q

chert

A

non opaque quartz

Q

Travertine

A

FIZZ, grows around a nucleation point