Manuscripts
Dark Canyon, 1-2 miles from Colorado River. Hermosa Formation (Rico?)
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Dark Canyon between LeanTo Canyon and the river. Rico formation
Manuscripts
mssMarston papers V017/0045
Dark Canyon between Youngs Canyon and the river, showing hard limestone layer heavily fossilized, probably Rico formation
Manuscripts
mssMarston papers V017/0044
Dock and Margaret Marston in the "Joan" in Cataract Canyon. Down river to Dark Canyon from approximately Mile 183 1/2
Manuscripts
mssMarston papers V017/0030
