Evidence of a hotter mantle in the Archean comes from _________ volcanic rock,which is found only in Archean crust.
A)peridotite
B)ultramaficite
C)komatiite
D)rhyolite

Question

Quizplus · Accepted Answer

Komatiite is a type of ultramafic volcanic rock that is evidence of a hotter mantle in the Archean era. Its presence indicates higher temperatures in the Earth's mantle during the Archean, as komatiite lava has very high melting temperatures that are not commonly reached in the Earth's mantle today.

Evidence of a Hotter Mantle in the Archean Comes from _________