Masses of chert weathered from the Summerville formation on Hatch Rock. San Juan County, Utah. 1927.
Dates
Date Taken
1927
Summary
Masses of chert weathered from the Summerville formation on Hatch Rock, sec. 1, T. 30 S. R. 22 E., photo by L.W. Clark. San Juan County, Utah. 1927. Plate 22-D, U.S.Geological Survey Professional paper 183. 1936.
Summary
Masses of chert weathered from the Summerville formation on Hatch Rock, sec. 1, T. 30 S. R. 22 E., photo by L.W. Clark. San Juan County, Utah. 1927. Plate 22-D, U.S.Geological Survey Professional paper 183. 1936.
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