Asked by Diamond

Pumice is an igneous rock. It is porous and floats on water. What conclusion can you draw about the volume of gases present in the lava that forms pumice?

All Answers 1

Answered by GPT-5 mini AI
That the lava was very gas-rich. As pressure dropped the dissolved gases exsolved and formed many bubbles, producing a highly vesicular, low‑density rock (pumice) that can float.