One common example of a rock formed by heat and pressure in the solid phase is metamorphic rock. Metamorphic rock is formed when pre-existing rocks, such as sedimentary or igneous rocks, are subjected to high temperatures and pressures without melting. This process causes the minerals within the rocks to recrystallize and reorient, resulting in a new rock with different physical and chemical properties. Examples of metamorphic rocks include marble, slate, and gneiss.
