Geology > Naming Igneous rocks > Flashcards

Naming Igneous rocks Flashcards

(8 cards)

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1
Q

Granite (internal crystals, light coloured, continental crust)

A

intrusive, Felsic

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2
Q

Rhyolite(external crystals, light, continental crust)

A

Extrusive, felsic

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3
Q

Pumice

A

felsic

frothy

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4
Q

Obsidian

A

DARK

GLASSY

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5
Q

Intermediate

aphanitic or porphyritic

A

Andesite

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6
Q

Intermediate
plutonic
coarse grained (phaneritic)

A

Diorite

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7
Q

Mafic

aphanitic

A

Basalt

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8
Q

Mafic
Phaneritic-intrusive
oceanic crust

A

Gabbro

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