Photograph of the Palouse Canyon below the falls, in eastern Washington. Basalt cliffs line the canyon walls and the Palouse River winds its way down to join the Snake River.
Expeditions & surveys; Railroad surveys; Canyons; Grand Coulee (Wash.)
"The Grand Coulee is about ten miles wide where it opens on the Columbia River at its northern end, which is a hundred feet above the water, and gradually widens toward the south; its walls, eight hundred feet high are formed of solid basaltic...
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.