Charred wood caught between layers of lava, indicating that there was enough time elapsed between flows to allow vegetation to grow on or around the older flow.
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.
Cheney State Normal School -- Field trips; Fossils; School field trips
Photo of what appears to be a class field trip. Eighteen or nineteen students appear to be looking for fossils on a hillside of sedimentary rock. Students' apparel, including hats, is indicative of the 1920s.
Eastern Washington State College -- Students; Geology
Photograph of an Eastern Washington State College (currently Eastern Washington University) Geology student examing a rock sample with faculty member Martin Mumma looking on.
Eastern Washington State College -- Students; Geology
Photograph of Eastern Washington State College (currently Eastern Washington University) Geology student Lee C. Nesbit examining rock samples with a hand lens.
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...
Grand Coulee Dam (Wash.);Hydroelectric power plants -- Washington (State);Dams -- United States -- Design and construction;Cofferdams -- Design and construction.
The preparation of the southern end of the dam site has had most of the loose rock removed, and the coffer dam complete. The work of removing soil and loose rock on the north end of the dam was still under way.