Metamorphic zone

Schematic map of a terrane with an increasing metamorphic grade. There are two folded lithologies: quartzite (originally sandy sediment) and pelite (originally clayey sediment). The index minerals can only grow in the pelite. The highest indicated isograd is the solidus of hydrated granite, at higher metamorphic grade partial melting occurred in the quartzite.

In geology, a metamorphic zone is an area where, as a result of metamorphism, the same combination of minerals occurs in the bed rocks. These zones occur because most metamorphic minerals are only stable in certain intervals of temperature and pressure.

单词	Metamorphic zone
释义	Metamorphic zone 英语百科 Metamorphic zone In geology, a metamorphic zone is an area where, as a result of metamorphism, the same combination of minerals occurs in the bed rocks. These zones occur because most metamorphic minerals are only stable in certain intervals of temperature and pressure.
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