Question

Why is Pumice porous?

Answer 1

Answer:

The pore spaces (known as vesicles) in pumice are a clue to how it forms. The vesicles are actually gas bubbles that were trapped in the rock during the rapid cooling of a gas-rich frothy magma. ... As the magma breaks through Earth's surface, the sudden pressure drop causes the gas to come out of solution.

Answer 2

• Pumice, also known as pumicite, is a volcanic rock made up of highly vesicular rough-textured volcanic glass that may or may not contain crystals in its powdered or dust form.
• Its colour is usually light. Scoria is a vesicular volcanic rock with bigger vesicles, thicker vesicle walls, and a darker and denser hue than pumice.
• Pumice is formed when a volcano forcefully ejects super-heated, highly pressured rock.
• Pumice forms an odd foamy structure as a result of fast cooling and depressurization at the same time.