Existing rocks are buried and forced toward the mantle, increasing heat and pressure. This is the first step in the formation of metamorphic rocks.Which best describes the next step in the formation of metamorphic rocks?
Answer
A
Buried rocks melt deep within the mantle.
B
Lava melts underlying rocks, which crystallize into new minerals.
C
Rocks that were buried are exposed at Earth’s surface, where they are weathered and eroded.
D
Magma pockets rise, which increases heat, and minerals change due to temperature and pressure.