Question

the rock in the picture is rhyolite, an extrusive igneous rock. based on its appearance, how would you classify this rock? a) intermediate b) mafic c) felsic d) ultramafic

Explanation:

Felsic rocks are light - colored and have a high silica content. Rhyolite is a light - colored extrusive igneous rock, which is characteristic of felsic rocks. Intermediate rocks have a moderate silica content and are usually gray in color. Mafic rocks are dark - colored with low silica and high iron and magnesium content. Ultramafic rocks have even lower silica and are very rich in iron and magnesium.

Answer:

C. Felsic