What Happens When Lava Cools down?

Answer

When lava cools after an eruptions ingenious rocks are formed. It is usually glassy in texture and is relatively light. The lava flow is very destructive, burning and clearing everything that it is in its way.
Q&A Related to "What Happens When Lava Cools down?"
water.
http://wiki.answers.com/Q/What_cools_down_lava
The air cools down the lava after a volcano erupts. If they volcano is under water, the water
http://www.chacha.com/question/what-cools-lava-dow...
I've wondered about this because I could imagine that all the water on Earth could sink deep into the ground if the hot iron core cools down and thus the oceans would vanish. So far
http://www.mylot.com/post/2496897/what-happens-if-...
Convection is the transfer of heat through a substance (solid, liquid, or gas) caused by molecular motion. When it cools, it becomes denser and sinks.
http://www.kgbanswers.com/what-would-happen-to-the...
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