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[[underlined]] 1892 November 27. [[/underlined]] Examine the exposures on [[insertion]] ^ Kansas Ave [[/insertion]] the road that leads from the Rock Creek electric railroad down the ravine to the Zoological park, foot of Garnier Heights. They are the most interesting of the kind I have seen and present a repetition of the 16th street cut on a much finer scale. The disturbed materials contain more Potomac clay and some of the pockets are two feet in diameter, dark colored and full of comminuted vegetable matter. Just below the short turn to the west on the north side of the road they are about 25 feet in thickness and rest squarely on the undisturbed but decomposed Archean. This latter is inclined and stands at an angle of nearly 45°, the later deposit lying against it. The following is a sketch of this exposure: [[end page]] [[start page]] [[image: Pencil sketch showing the cross section of the location as described above.]] [[image labels]] Sand Clay lens Cobble Clayball Archean [[/image labels]]
Note: Communiting is a geologic term meaning crushing, grinding or otherwise breaking down materials.
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