Which of the following is formed when lava cools on the earth's surface?
A
Basalt
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B
Granite
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C
Pumice
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D
All of the above
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Solution
The correct option is A Basalt Basalt is formed when lava cools on the earth's surface. Granite is formed when magma cools below the surface of earth. Pumice is formed by cooling of froth lava on the surface.