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Aerial photograph showing hairpin ridge in the Chismville syncline, outward facing scarp is formed by the closure of a sandstone bed in the McAlester shale across the axis of the westward-plunging Chismville syncline about 10 miles southwest of Paris. Photograph courtesy of Agricultural Adjustment Administration. Logan, Arkansas. 1936. Plate 16, in U.S.Geological Survey Professional paper 221-E. 1950.
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Aerial photograph of the west end of the Washburn anticline; note the strong asymmetry of the fold and that the prominent ridge in the center disappears in to the belt of steep dips in the northeast corner. Photograph courtesy of Agricultural Adjustment Administration. Sebastian County, Arkansas. 1936. Plate 15, in U.S.Geological Survey Professional paper 221-E. 1950.
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Ned and Hollis lakes, the two lakes are parts of an old oxbow lake in a cut-off meander of the Arkansas River, 4 miles southeast of Van Buren. Note meander scars on the flood plain from high level terrace deposits in the upper right corner. Photograph courtesy the Agricultural Adjustment Administration. Crawford County, Arkansas. 1936. Figure 18 in U.S. Geological Survey. Professional paper 221-E. 1950.