What is the term for felsic extrusive igneous rock with glassy texture?
A) scoria
B) rhyolite
C) granite
D) obsidian

Question

Quizplus · Accepted Answer

Obsidian is a felsic extrusive igneous rock that has a glassy texture due to its quick cooling process. Scoria is also an extrusive igneous rock but has a vesicular texture due to trapped gases. Rhyolite is similar to granite but is extrusive and has a fine-grained texture. Granite is an intrusive igneous rock with coarse-grained texture.

What Is the Term for Felsic Extrusive Igneous Rock with Glassy