The image below shows a lava dome that never left the volcanic crater.What is the likely composition of the rocks that make up this lava dome?

A)felsic
B)intermediate
C)mafic
D)ultramafic

Question

The image below shows a lava dome that never left the volcanic crater.What is the likely composition of the rocks that make up this lava dome?

A)felsic 
B)intermediate 
C)mafic 
D)ultramafic

Quizplus · Accepted Answer

Lava domes are typically formed from highly viscous lava that consists of high-silica content magma. This type of magma is associated with felsic rocks, which are rich in feldspar and quartz. Therefore, the likely composition of the rocks that make up this lava dome is felsic.

The Image Below Shows a Lava Dome That Never Left