pyrolite

Etymology

From pyro- + -lite.

pyrolite means A theoretical rock considered to be the best approximation of the composition of Earth's upper mantle, generally considered to be one part tholeiitic basalt and three parts dunite. Lexicurio rates it Sui generis — a strength score of 87 out of 100.

noun

A theoretical rock considered to be the best approximation of the composition of Earth's upper mantle, generally considered to be one part tholeiitic basalt and three parts dunite.