How do metamorphic rocks reach earth's surface?

How do mafic volcanic rocks get to Earth's surface? Pressure from overlying crust forces mantle magmas through cracks to Earth's surface. Could metamorphic rocks reach the surface of a planet without rock-uplifting processes? No, metamorphic rocks must be uplifted and exposed by erosion. read more

Pressure from overlying crust forces mantle magmas through cracks to Earth's surface. These magmas erupt out of volcanoes, cool, and solidify into rock. read more

The metamorphic rocks reach the surface as mostnon-volcanic rocks which are not mined. The tectonic movements of landmasses can push the layers of rocks upward and downward. The upward pushed parts become the surfaced parts of hills and mountains. read more

Buried rocks can also be exposed when extensional events occur (the crust is stretched) and some parts of the crust drop down in relation to others and expose rocks in the basins that form. 3. Erosion. Many rocks are present on the earth's surface because the overlying rocks have been eroded down to them. read more