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How are igneous rocks formed? A. Lava or magma heats up and crystallizes. B. Hail falls and melts. C. Glaciers melt. D. Lava or magma cools and then crystallizes.

How are igneous rocks formed? A. Lava or magma heats up and crystallizes. B. Hail falls and melts. C. Glaciers melt. D. Lava or magma cools and then crystallizes.
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How are igneous rocks formed?

A. Lava or magma heats up and crystallizes.
B. Hail falls and melts.
C. Glaciers melt.
D. Lava or magma cools and then crystallizes.

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User Cdalitz
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1 Answer

5 votes
its D.obsidian is a rock that is cooled from lava to form a hard,black glass that was made into spear tips.
answered
User Oink
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8.9k points
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