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Person

George Billingsley

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View north toward basalt dike (photograph EI10) in Hakatai Shale, Unkar Group, on north side of river mile 77.2, at beginning of Hance Rapids. Shinumo Sandstone forms cliff at upper edge of photograph.
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Aerial view northwest toward Horn Creek Rapids, river mile 90.9, showing numerous pegmatite and granite dikes in black Vishnu Schist. Inner canyon is 1,300 feet deep here.
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