A rock with a porphyritic texture has large crystals “floating” in small crystals. Describe what made it form this way.

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15-12-2020
Geography

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A rock with a porphyritic texture has large crystals “floating” in small crystals. Describe what made it form this way.

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Аноним Аноним · Answer 1 · 2020-12-20T23:39:41+01:00

Аноним Аноним

20-12-2020

Answer: Summary. Intrusive igneous rocks cool from magma slowly because they are buried beneath the surface, so they have large crystals. Extrusive igneous rocks cool from lava rapidly because they form at the surface, so they have small crystals. Texture reflects how an igneous rock formed.

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