Clay minerals within a buried body of slate are recrystallized at high temperatures and pressures to form mica,producing a rock called phyllite; this is an example of ____________.
A) diagenesis
B) erosion
C) metamorphism
D) weathering

Question

Clay minerals within a buried body of slate are recrystallized at high temperatures and pressures to form mica,producing a rock called phyllite; this is an example of ____________. 
A) diagenesis 
B) erosion 
C) metamorphism 
D) weathering

Quizplus · Accepted Answer

The transformation of clay minerals into mica at high temperatures and pressures is a process called metamorphism. Therefore, the formation of phyllite from slate is an example of metamorphism.

Clay Minerals Within a Buried Body of Slate Are Recrystallized