Science / Geology / Metamorphism: The changes of mineralogy and texture imposed on a rock by pressure and temperature in the Earth's interior. Meteoric water: Rainwater, snow, hail, and sleet.
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Regional Metamorphism

Science / Geology / Regional Metamorphism: Metamorphism across a broad area caused by the elevated temperatures and pressures of plate collision or deep burial. MORE

Retrograde Metamorphism

Science / Geology / Retrograde Metamorphism: Mineral changes within a rock that are caused by adjustments to conditions of reduced temperature and pressure. MORE

Hydrothermal Metamorphism

Science / Geology / Hydrothermal Metamorphism: Alteration of rock by hot waters or gases associated with a magmatic source. MORE

Contact Metamorphism

Science / Geology / Contact Metamorphism: Mineralogical and textural changes and deformation of rock resulting from the head and pressure of an igneous intrusion in the near vicinity. MORE