Image taken in April 2004 by Daniel Mayer.

Image view: The Tanner Graben, downstream on Colorado River. (photo left)
The Tanner Graben contains the en:Nankoweap Formation-(horizontal striped unit, tilted), overlaying en:Cardenas Lava-(also tilted), (from pg. 81, Fig. 13, "View to the north from the top of the Redwall Limestone along en:Tanner Trail" -(Photo & naming Graphic), book: Hiking Arizona's Geology, by Ivo Lucchitta, c 2001).

(Also, center-left-edge)--The short vertical (dark) cliff is en:Tapeats Sandstone-(the Tapeats Sea, of Tonto Group), sitting above a section of Chuar Group-(the en:Great Unconformity)-(same book, photo(A), & Graphic rendering(B), pp. 80-81); the Tanner Graben is east (with the striped/layered en:Nankoweap Formation, banding, easily seen. (Chuar Group and Nankoweap, part of Grand Canyon Supergroup; also, the Unkar Grp, (Cardenas Lava, and Dox Formation, units 6,5 of 6 total).

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