Geology -- Washington (State); Waterfalls; Volcanic rock; Canyons
Photo of Dry Falls, a dry cliff that stands 400 ft. high and 3.5 miles wide. Dry Falls is a feature of Grand Coulee Canyon, which is part of the channeled scablands of eastern Washington.
Expeditions & surveys; Railroad surveys; Teton River (Minn.); Valleys
The Teton Valley, "a vast plain, descending towards the east, the soil of inferior quality, and the dry vegetation indicated the change in the climate observed in going over the high, dry plains towards the Missouri." "The valley...