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Choose one of the following Rocks for more details:

Blueschist

Blueschist

Changed by subduction, this rock was once sea-floor basalt. It was metamorphosed at high pressures and low temperatures, transforming into a blueschist.

Epidote Blueschist

Epidote Blueschist

The minerals in this metamorphic rock record the following temperature (T) and pressure (P) conditions within the Earth: T= 350 - 400°C, P= 7,000 - 10,000 atm.

Garnet blueschist

Garnet blueschist

The minerals in this metamorphic rock record the following temperature (T) and pressure (P) conditions within the Earth: T = 400-450°C, P = 7,000-10,000 atm.


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