How is the rock pumice made?

Answer 1

Pumice is formed by the rapid cooling of gas entrained (frothy) felsic lava which is erupted from volcanoes.

If the amount of trapped gases in the lava is high, and cooled quickly enough to trap the bubbles of gas before they can escape, vesicular pumice will be formed, resulting in the only igneous rock that is able to float in water.

Answer 2

Pumice is an igneous rock. It is made from the rapid cooling of lava that has a high gas content.

These gasses come out of solution very quickly as the lava is erupted due to the loss of confining pressure and form bubbles in the lava making it "frothy". The rapid cooling of the lava traps the gas bubbles in the solidified lava creating pumice's unique vesicular texture.

Answer 3

Pumice does not form in earth's crust, but rather forms above it. It forms when a volcano erupts explosively, ejecting gas-rich magma. Bubbles form in the magma as it depressurizes while rapid cooling from contact with air or water turns the magma into solid glass, locking the bubbles in place.

Answer 4

pumice rocks are formed when a lava cools down quickly & comes out of volcano

Answer 5

Yes. Pumice is formed when foamy lava rapidly solidifies.

Answer 6

Pumice is a type of volcanic rock that forms when frothy lava cools rapidly, trapping gas bubbles within the rock. These gas bubbles give pumice its unique porous and lightweight texture.