A scientist identifies a rock sample as rhyolite. Why did he do so?
A) He observed that the rock has a lot of silica, making it mafic.
B) He observed that the rock has a lot of silica, making it ultra-mafic.
C) He observed that the sample has little silica, making it felsic.
D) he observed that the sample has a lot of silica, making it felsic.

Question

Quizplus · Accepted Answer

The scientist identified the rock sample as rhyolite because he observed that the sample has a lot of silica, making it felsic. Rhyolite is a type of felsic rock that is high in silica content.

A Scientist Identifies a Rock Sample as Rhyolite