Question

pumice rock is an example of an igneous rock that is porous. how do you think pumice rock became porous?

Answer 1

Respuesta:

Pumice is formed by lava coming into contact with water. When the hot magma comes into contact with the water, rapid cooling and rapid de-pressurization creates bubbles by lowering the boiling point of lava. The cooling of the rock below the rock's melting point means that when the rock changes almost immediately to a solid after coming into contact with the water, the bubbles are trapped inside. Because pumice is igneous, it is at times glass-like, and the bubbles are trapped between the thin translucent bubble walls of rock.