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, silica-rich magma. This type of magma is associated with felsic (or intermediate) rocks, which are lighter in color and have a higher silica content than mafic or ultramafic rocks. 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