Flow in east fork of 234 Mile Canyon below the spring found by Jim Ervin in 1931. The Redwall at upper right appears upper left center in Butchart 66-7-3 GDCN 233-5 and at left in Butchart 66-6-5 GDCN 233-6
Papers of Otis R. Marston: Still images, 1870-1978. vols. 56-104, Colorado River and tributaries (Grand Canyon to Gulf of California) The Otis Marston Colorado River Collection
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