Intermediate rocks like andesite and diorite _________.
A) are major constituents of the oceanic crust
B) form mainly in volcanic island arcs and convergent continental margins
C) rarely contain plagioclase feldspar, pyroxenes or amphiboles
D) contain the semiprecious gems beryl, topaz, and tourmaline

Question

Quizplus · Accepted Answer

Intermediate rocks like andesite (volcanic) and diorite (plutonic) are typically associated with volcanic island arcs and convergent continental margins, where the crust is being compressed and subducted, leading to melting and the formation of these rock types.

Intermediate Rocks Like Andesite and Diorite _________