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The Yellowstone Plateau Volcanic Field, also known as the Yellowstone Supervolcano or the Yellowstone Volcano, is a complex volcano, volcanic plateau and volcanic field located mostly in the western U.S. state of Wyoming, but it also stretches into Idaho and Montana. [4] [5] It is a popular site for tourists. [6] Map of Yellowstone Volcano ash beds
The Lava Creek Tuff is a voluminous sheet of ash-flow tuff located in Wyoming, Montana and Idaho, United States. It was created during the Lava Creek eruption around 630,000 years ago, which led to the formation of the Yellowstone Caldera. This eruption is considered the climactic event of Yellowstone's third volcanic cycle.
In the Shirley Basin, south of Casper, Wyoming, the Wind River Formation has a brilliant white color imparted by rhyolite ash fall in the Oligocene, Miocene and Pliocene from volcanic eruptions further west in the Basin and Range Province. Young Cenozoic rocks are well preserved in a downfaulted area in the Sweetwater Hills.
The eastern Snake River Plain is a topographic depression that cuts across Basin and Range Mountain structures, more or less parallel to North American Plate motion. Beneath more recent basalts are rhyolite lavas and ignimbrites that erupted as the lithosphere passed over the hotspot.
Yellowstone National Park, Wyoming, United States: Parent range: Rocky Mountains: Topo map: USGS Yellowstone National Park: Geology; Rock age: 2,100,000–70,000 years [3] Mountain type(s) Caldera [2] and supervolcano: Volcanic field: Yellowstone Plateau: Last eruption: Approximately 640,000 years ago (caldera-forming); 70,000 years ago (in the ...
Their sediment came from rock eroded from a mountain chain east of the seaway interspersed with ash from volcanos west of the seaway in the Sierran Arc (a long volcanic island chain like the modern Andes Mountains but in island form). This ash eventually became bentonite, a clay which expands in water and thus causes landslides in the park. [8]
The Bighorn Basin is a plateau region and intermontane basin, approximately 100 miles (160 km) wide, in north-central Wyoming in the United States. It is bounded by the Absaroka Range on the west, the Pryor Mountains on the north, the Bighorn Mountains on the east, and the Owl Creek Mountains and Bridger Mountains on the south.
Mount Sheridan, elevation 10,313 feet (3,143 m), is a prominent mountain peak overlooking Heart Lake in the Red Mountains of Yellowstone National Park. The peak is named in honor of General Philip H. Sheridan , U.S. Army, one of the early protectors of the park.