Metamorphism: Alteration of Rocks by Temperature and Pressure--Part 1 of 2

Introduction to Geology, metamorphic rocks, types of metamorphism, causes of metamorphism, geotherm, geothermal gradient, confining pressure, lithostatic pressure, directed pressure, geobarometer, geothermometer, metamorphic grade, metasomatism, regional metamorphism, burial metamorphism, shock metamorphism, high-pressure metamorphism, seafloor metamorphism, contact metamorphism, baked zone, kimberlites, diatremes, asteroid impact, bolide impact