metamorphic zone
metamorphic zone The area between two successive isograds in a metamorphic terrain. The zone is named after the lowergrade isograd (see METAMORPHIC GRADE). For example, the area lying between the garnet isograd and the kyanite isograd for pelitic rocks in a regional metamorphic terrain is termed the garnet zone. The zone defines a set of pressure, temperature, P(H2O), and P(CO2), over which there were no mineralogical reactions in the particular rock composition concerned. Normally, the chemical composition of pelites is used as a marker.
More From encyclopedia.com
Metamorphism , Metamorphism is the process by which the structure and mineral content of rocks transform in response to changes in temperature , pressure , fluid co… Metamorphic Rocks , Metamorphic rock is rock that has changed from one type of rock into another. The word metamorphic (from Greek) means “of changing form.” Metamorphic… Partial Melting , A process known as partial melting generates the molten rock , known as magma , that cools to form crystalline rocks in the earth's outer composition… Sedimentary Rock , Sedimentary rocks form at or near Earth’s surface from the weathered remains of pre-existing rocks or organic debris. The term sedimentary rock appli… Iron Ores , Rocks
Rocks are composed of minerals, which are natural inorganic (nonliving) substances with specific chemical compositions and structures. A rock m… petrology , pe·trol·o·gy / pəˈträləjē/ • n. the branch of science concerned with the origin, small-scale structure, and composition of rocks. Compare with lithol…
You Might Also Like
NEARBY TERMS
metamorphic zone