Manuscripts
Southwest to Bridge and Gneiss Canyons
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Bridge Canyon and Gneiss Canyon (right). The inner gorge of the Colorado River is about 800 feet deep
Manuscripts
mssMarston papers V096/0013

Up to Bridge Canyo and the un-named canyon at Mile 234.2. The side canyon at Gneiss Canyon right bank, is lower left
Manuscripts
mssMarston papers V096/0020



