Clay minerals within a buried body of shale are recrystallized at 400ºC and high pressure to form mica,producing a rock called phyllite; this is an example of ____________.
A) diagenesis
B) erosion
C) metamorphism
D) weathering

Question

Quizplus · Accepted Answer

The process described involves both high pressure and temperature, which are characteristic of metamorphism. Diagenesis typically involves lower temperatures and pressures than metamorphism, erosion is the process of wearing away earth materials through the action of wind, water, and ice, and weathering is the physical and chemical breakdown of rocks and minerals at or near the Earth’s surface.

Clay Minerals Within a Buried Body of Shale Are Recrystallized