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the eploration of the colorado river and its canyons
the eploration of the colorado river and its canyons Author:j.w. powell The time is 1 p.m. May 24 1869. The place: the Green River portage in present-day Wyoming. The personnel are ten: Major John W. Powell, one-armed Civil War veteran, (later head of the U.S Geological Survey) and nine geologists, geographers, scouts, and adventurers. Their assignment: to fill in the last white space on the map, to explore the la... more »st great unmapped and unknown part of the continental United States.« less