What type of volcanic rock contains a large number of vesicles (bubbles)that form when gases escape from the solidifying melt?
A)granite
B)obsidian
C)porphyry
D)pumice

Question

Quizplus · Accepted Answer

Pumice is characterized by a large number of vesicles, which are formed by the escape of volcanic gases during the rapid cooling and solidification of lava. These vesicles give pumice its light, porous texture.

What Type of Volcanic Rock Contains a Large Number of Vesicles