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Migmatite (1,700Ma old precambrian metasediment)

Beaver Dam Mountains, Utah, precambrian, 1.7billion years.

Migmatites are metamorphic rocks subjected to high pressure and very high heat. As a result, some components are melting (such as the whitish feldspar), whereas the more mafic components undergo ductile solid deformation. Kind of subterranean toffee factory...

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Uploaded on April 20, 2021
Taken on April 14, 2021