Hogback ridges of Perry Park. Douglas County, Colorado 1913.
Dates
Date Taken
1913
Summary
Hogback ridges of Perry Park, looking northwest across Bear Creek, curved double row of hogbacks of vertical Lyons sandstone on left and Dakota sandstone on right, separated by valley of softer rock. Sandstone of Purgatoire formation makes shoulder on left slope of Dakota hogback in distance. Gypsum of Lykins formation composes low white ridge in middle ground. Douglas County, Colorado 1913. Plate 12 in U.S. Geological Survey. Folio 198. 1915.
Summary
Hogback ridges of Perry Park, looking northwest across Bear Creek, curved double row of hogbacks of vertical Lyons sandstone on left and Dakota sandstone on right, separated by valley of softer rock. Sandstone of Purgatoire formation makes shoulder on left slope of Dakota hogback in distance. Gypsum of Lykins formation composes low white ridge in middle ground. Douglas County, Colorado 1913. Plate 12 in U.S. Geological Survey. Folio 198. 1915.
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