How can you tell if the rock is igneous?

Question

Geography

Jett Miranda

25 May, 18:22

How can you tell if the rock is igneous?

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Answers (1)

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Cody Houston · Answer 1

Determine the color (indicates mineral composition)

Determine the texture (indicates cooling history)

Phaneritic: large grains.

Aphanitic: small grains (too small to identify with the naked eye)

Porphyritic: fine grains mixed with larger grains.

Vesicular: holes.

Glassy: glass-like.

Explanation:

Things like this determine if its igneous or not.