What would you call an aphanitic, vesicular, black rock having small pale green phenocrysts of olivine and small white lath shaped phenocrysts of plagioclase?
A) basalt
B) rhyolite
C) obsidian
D) andesite

Question

Quizplus · Accepted Answer

This description fits basalt, which is aphanitic (fine-grained), can be vesicular (contains gas bubbles), is typically black, and often contains olivine and plagioclase minerals.

What Would You Call an Aphanitic, Vesicular, Black Rock Having