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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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View east and upriver toward Unkar Group of rocks, Cardenas Basalt sill (black), Bass Formation (light gray), Hakatai Shale (red), unconformably below overlying Cambrian Tapeats Sandstone, from south side of river mile 134.8.
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View east from Bass Trail across river toward Precambrian Wheeler Fold on north side of river mile 108.3. Mesoproterozoic rocks including Cardenas Basalt (black rock, lower right edge of photograph), Bass Formation (white strata, left side of photograph, Wheeler Fold, bottom center, and white ledges, base of upper cliffs), Hakatai Shale (brown cliff and upper gray ledges, upper center of photograph), and Shinumo Sandstone (brown cliff, upper edge of photograph).
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