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...
Expeditions & surveys; Railroad surveys; Mouse River (N. Dakota)
"Near Mouse River there are salt marshes" "and in some places deposits of salt a quarter of an inch thick." Mouse River valley "resembles that of the Sheyenne (Cheyenne). High ridges divide the plateau bordering the stream...