Tag Archives: hakatai shale

The Colorado River in the Grand Canyon – entering the Upper Granite Gorge

The Upper Granite Gorge begins where the run through Hance and Son of Hance rapids ends, at Mile 77.9.  The main rock type of the Upper Granite Gorge (and the other two Granite Gorges) is Vishnu Schist, a hard metamorphic … Continue reading

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