geol lab 6

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Last updated 4:23 AM on 10/14/26
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15 Terms

1
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NIC D

naturally-occurring, inorganic, crystalline solid, definite (not fixed) chemical composition

2
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mineral crystallization acronym order

OP AB PK MQ

3
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O, first

olivine

4
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P 1

pyroxene

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A

amphibole

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B

biotite

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P 2

plagioclase

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K

K-Feldspar

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M

muscovite

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Q, last

quartz

11
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intrusive rocks

crystallized SLOWLY WITHIN earth

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extrusive rocks

crystallized RAPIDLY AT surface

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large enough to see (course-grained), slowly within earth (intrusive)

Phaneritic

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too small to see (fine-grained), rapidly at surface (extrusive)

Aphanitic

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mix of course and fine grained, cooling both inside and outside the Earth

Porphyritic