petrology, tectonics

Eclogite

Besides its aesthetic beauty and awesome vibrant colors, eclogite is a very rare and important rock. Eclogites are mafic metamorphic rocks that are formed in subduction zone settings. They experience metamorphism at extremely high pressures (1.2 GPa), greater than those typical of the Earth’s crust, as well as medium to high temperatures.

They are responsible for slab pull, the pulling down and subduction of a tectonic plate. The reddish/brown colored minerals are garnet and the greenish minerals are omphacite, a Na-rich pyroxene.

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