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Composite dykes, 570-580Ma with rhyolite core and mafic rims, intruding into 610-615 Ma granite. Marker indicates viewpoint of the photographer, photo looking east
PhotoID361

Composite dykes, 570-580Ma with rhyolite core and mafic rims, intruding into 610-615 Ma granite. Marker indicates viewpoint of the photographer, photo looking east
PhotoID361

Photograph: Cees Passchier, Ghaleb Jarrar