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The Sheepeater Cliffs are a series of exposed cliffs made up of columnar basalt in Yellowstone National Park in the United States. The lava was deposited about 500,000 years ago during one of the periodic basaltic floods in Yellowstone Caldera , and later exposed by the Gardner River .
The earliest known lava in this cycle is the Wapiti Lake flow of the Mount Jackson group, dated at 1.2187 ± 0.0158 million years, [67] exposed near the Grand Canyon of the Yellowstone and likely vented near Wapiti Lake. [68] Another flow, the Moose Creek Butte flow (1.1462 ± 0.0022 million years), also belongs to the Mount Jackson group. [69]
The valley was the natural route to Yellowstone Lake as trappers, explorers and natives made their way up the Yellowstone River. On August 29, 1870, when Henry D. Washburn and Gustavus Cheyney Doane ascended Mount Washburn during the Washburn-Langford-Doane Expedition, they saw the great expanse of the Hayden Valley between Yellowstone Falls and the lake.
The Grand Canyon of the Yellowstone is the first large canyon on the Yellowstone River downstream from Yellowstone Falls in Yellowstone National Park in Wyoming. The canyon is approximately 24 miles (39 km) long, between 800 and 1,200 ft (240 and 370 m) deep and from 0.25 to 0.75 mi (0.40 to 1.21 km) wide.
A view of the Lower Falls at the Grand Canyon of the Yellowstone National Park on May 11, 2016. Yellowstone, the first National Park in the US and widely held to be the first national park in the ...
On December 18, 1871, a bill was introduced simultaneously in the Senate, by Senator S.C. Pomeroy of Kansas, and in the House of Representatives, by Congressman William H. Clagett of the Montana Territory, for the establishment of a park at the headwaters of the Yellowstone River. Hayden's influence on Congress is readily apparent when ...
1]: Length: 265 mi (426 km): Basin size: 5,397 sq mi (13,980 km 2): Discharge: : • location: Miles City, Montana: • average: 400 cu ft/s (11 m 3 /s): • minimum: 0 cu ft/s (0 m 3 /s): • maximum: 13,300 cu ft/s (380 m 3 /s): Basin features; Tributaries: : • right: Pumpkin Creek, Otter Creek, Hanging Woman Creek, Prairie Dog Creek, Goose Creek, Wolf Creek: The Tongue River is a ...
The canyon was first explored by Native American hunters, and later fur-trappers and gold prospectors. There was a significant amount of consideration given to the idea of running the railroad through the canyon to increase travel between Yellowstone National Park and Bozeman, Montana. Logging was conducted in the canyon at the turn of the 20th ...