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Precambrian gneiss, schist with lighter colored pegmatite

Pegmatite (lighter color) running through Precambrian gneiss and schist, Black Canyon of the Gunnison National Park, Colorado, USA

Colorado17A1733precambriangneissschistBlack Canyon of the GunnisonNational ParkUSABlack CanyongeologyNorth AmericaNorth Americannobodyrockformationsgeologicpegmatitedikespegmatite dikesvolcanicrockscloseupclose upcutmineralogy