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

Slate

Flat, no crystals, clanking sound

Phyllite

Green, foliated

Schist

Layered, could pull apart, probably colored

Gneiss

Striped Layers

Marble

FIZZ light colored, visible crystals

Quartzite

colored, fleshy vibes

Hornfels

Sparkles under light, dimples on the side?,

Skarn

weird and random

Serpentinite

Non foliated Phyllite

Eclogite

diseased rock for Christmas

Breccia and co.

rocks mushed together

Q Sandstone

sandy, not red

Arkose

red sandstone

Graywacke

gray sandstone

Shale

thinly bedded, thunk noise

Siltstone

layered but can feel grains

mudstone

layered but smooth

coal

light and black

Conquina

Shells fused together

Limestone

FIZZ oolitic and/or skeletal

Dolostone

Limestone that won't fizz unless powdered

chert

non opaque quartz

Travertine

FIZZ, grows around a nucleation point