. Bulletin of the Geological Society of America. Geology; Geology -- United States. Figure 1.—East and West Section at the loiver end of Nun-ko-weap Valley on the North side of the Brook. R. W. = Red Wall limestone (Carboniferous); U. T. = Upper Tonto (Upper Cambrian); T. Tonto sandstones (Middle Cambrian?); C=Shales of the Chuar group (Algonkian) ; G. C. = Shaly sandstones of the Grand Canon group (Algonkian) that belong below the lava beds L; a, a = Butte fault; 6, b and c, c = Pre-Cambrian faults. Vertical scale, 1000 feet = 1 inch. West. East. T. Sd. C. (c) li. (b) Figure 2.—Sect
. Bulletin of the Geological Society of America. Geology; Geology -- United States. Figure 1.—East and West Section at the loiver end of Nun-ko-weap Valley on the North side of the Brook. R. W. = Red Wall limestone (Carboniferous); U. T. = Upper Tonto (Upper Cambrian); T. Tonto sandstones (Middle Cambrian?); C=Shales of the Chuar group (Algonkian) ; G. C. = Shaly sandstones of the Grand Canon group (Algonkian) that belong below the lava beds L; a, a = Butte fault; 6, b and c, c = Pre-Cambrian faults. Vertical scale, 1000 feet = 1 inch. West. East. T. Sd. C. (c) li. (b) Figure 2.—Section on the North side of Nun-ko-weap Valley. The lettering is the same as in fig. 1. The faults c and 6 are here seen only at the surface, but their connection with c and b of section 1 can be readily traced. The 700 feet of the Tonto group above the sandstone and the Carboniferous Red Wall and Aubrey groups are not represented in the drawn section, although occurring above the Tonto sandstone where the section was taken. * Nun-ko-weap valley heads as a canon on the east face of the Kaibab plateau, then widens out to a mile in breadth before contracting to its canon outlet leading into the channel of the Colorado river. Its entire length is three miles. See maps accompanying Button's Tertiary History of the Grand Canon, 1882. ._,. (ol). Please note that these images are extracted from scanned page images that may have been digitally enhanced for readability - coloration and appearance of these illustrations may not perfectly resemble the original Geological Society of America. [New York, etc. ] The Society
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