Deschutes, Crook, and Jefferson counties, Oregon, U.S.
Geology
Age of rock
29.5 Ma
Mountain type
Caldera, supervolcano
Volcanic arc
Cascade Volcanic Arc, Ochoco Mountains
Last eruption
29.5 million years ago
The Crooked River caldera is a large and ancient volcano that straddles three central Oregon counties. The diameter of the caldera is about 41 by 27 kilometres (25 mi × 17 mi) and is notable for the welded tuff present at Gray Butte, Smith Rock, Powell Buttes, Grizzly Mountain and Barnes Butte. The volcano is considered extinct and last erupted about 29.5 Ma.[1]
^ The Crooked River Caldera is also a supervolcano.
"Field trip guide to the Oligocene Crooked River caldera: Central Oregon's Supervolcano, Crook, Deschutes, and Jefferson Counties, Oregon" (PDF). Oregon Geology. Oregon Department of Geology and Mineral Studies. 2009. Retrieved 2014-12-29.
and 23 Related for: Crooked River caldera information
The CrookedRivercaldera is a large and ancient volcano that straddles three central Oregon counties. The diameter of the caldera is about 41 by 27 kilometres...
Prineville. Barnes Butte is composed of welded tuff and is a part of the CrookedRivercaldera. It was the site of a 1940s mercury mine. In 2015, a BLM cleanup...
United States. It is composed of welded tuff and is a part of the CrookedRivercaldera. A recreation trail for hiking, horseback riding, and mountain biking...
formations. Approximately 30 million years ago, a large caldera was formed (CrookedRivercaldera) when overlying rock collapsed into an underground magma...
fissure system which extends from Lava Butte to East Lake within Newberry Caldera. Sometime after 1901, the Great Northern Railway was extended south through...
buttes. Welded tuff has been found, showing it once comprised the CrookedRivercaldera. The buttes are morphologically related to the Ochoco Mountains...
incorporates public domain material from Deschutes & Ochoco National Forests – CrookedRiver National Grassland. United States Forest Service. (archived) "Jordan...
Southern Illinois | ISGS". "Latent Thermal Effects from Porcupine Volcanic Calderas Underlying the White Pine Straitform Copper Mineralization)". www.researchgate...
Lava Field is a basaltic volcanic field located south east of Newberry Caldera in the U.S. state of Oregon. The volcanic field covers about 30 square...
known as ermines), long-tailed weasels, American minks, North American river otters, and bobcats. Deer species include Roosevelt elk, black-tailed deer...
Cascades Bald Mountain Bald Mountain Caldera Barnes Butte Bly Mountain China Hat Cline Buttes CrookedRiverCaldera Deschutes Formation Hager Mountain Horse...
Garden Volcanic Field is a volcanic field located south east of Newberry Caldera in Oregon. The lava field consists of several flows of pahoehoe lava that...
volcano contains a large caldera, 4 by 5 miles (6.4 km × 8.0 km) in diameter, known as the Newberry Caldera. Within the caldera are two lakes: Paulina Lake...
Cascades Bald Mountain Bald Mountain Caldera Barnes Butte Bly Mountain China Hat Cline Buttes CrookedRiverCaldera Deschutes Formation Hager Mountain Horse...
largescale sucker, the Klamath smallscale sucker, and the endangered Lost River sucker and shortnose sucker. Pelican Butte is part of the Quaternary Mount...
Abernethy, and Clackamas Rivers, while the Washougal and Sandy Rivers mark notable tributaries for the Columbia River. The Columbia River has significantly shaped...
the North Fork of the Breitenbush River. It can be accessed from trails running from the Clackamas and Breitenbush River drainages, which reach the eastern...
Cascades Bald Mountain Bald Mountain Caldera Barnes Butte Bly Mountain China Hat Cline Buttes CrookedRiverCaldera Deschutes Formation Hager Mountain Horse...
States Board on Geographic Names in 1929. This name drew from the Santiam River, its name referring to the Santiam people, who were forced to leave the...
when the sudden influx of non-indigenous settlers resulted in the Rogue River Wars. After the wars, the Latgawa were forced away from the region onto...
has a cool climate, and the butte and its surroundings feature meadows, rivers, and mixed forests. Powell Butte hosts the Powell Butte Nature Park, which...
four primary visitor destinations: Lava Butte, Lava River Cave, Lava Cast Forest, and Newberry Caldera. The highest point within the monument is the summit...
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