Upper member of Marathon limestone, exposed in bed of Alsate Creek. Brewster County, Texas. 1930.
Dates
Date Taken
1930
Summary
Upper member of Marathon limestone, exposed in bed of Alsate Creek, 3 miles west- southwest of old Fort Pena Colorado; shows alternation of flaggy limestones and shales. Brewster County, Texas. July 1930. Plate 3-A, U.S.Geological Survey Professional paper 187. 1937.
Summary
Upper member of Marathon limestone, exposed in bed of Alsate Creek, 3 miles west- southwest of old Fort Pena Colorado; shows alternation of flaggy limestones and shales. Brewster County, Texas. July 1930. Plate 3-A, U.S.Geological Survey Professional paper 187. 1937.
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