Alphabetical
eclogite
[noun]
A metamorphic rock that forms from mafic rocks (like basalt and gabbro) under extremely high pressure. The main minerals present are garnet and a green pyroxene, giving the rock a characteristic, mottled red and green appearance. The most common environment where ecolgites form is deep in subduction zones, where subducted oceanic crust is put under very high pressures.
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