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Which of the following rocks is formed by cooling lava?

obsidian
limestone
sandstone
marble

Sagot :

Answer:

obsidian

Explanation:

Obsidian is a naturally occurring volcanic glass formed when lava extruded from a volcano cools rapidly with minimal crystal growth. It is an igneous rock. Obsidian is produced from felsic lava, rich in the lighter elements such as silicon, oxygen, aluminium, sodium, and potassium.

obsidian is formed by cooling the lave.