A finely crystalline or glassy igneous texture indicates that:
A) there was a lot of gas in the magma
B) the rock cooled quickly
C) the rock broke apart as it flowed
D) the rock cooled slowly
E) the ash and pumice were hot and became compacted

Question

Quizplus · Accepted Answer

A finely crystalline or glassy texture in an igneous rock indicates that the rock cooled quickly, preventing the formation of large crystals.

A Finely Crystalline or Glassy Igneous Texture Indicates That