While the ultramafic rock, peridotite, comprises the bulk of the mantle, the earth hasn't been hot enough to make much_________(its volcanic equivalent) since the Precambrian.
A) andesite
B) welded tuff
C) gabbro
D) komatiite

Question

Quizplus · Accepted Answer

Komatiite is the volcanic equivalent of peridotite and is known for its formation under extremely high temperatures that were more common in the Earth's early history, particularly in the Precambrian era.

While the Ultramafic Rock, Peridotite, Comprises the Bulk of the Mantle