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Uinkaret volcano

volcanic field 1555 m / 5,102 ft
Arizona, USA (mainland exept Alaska), 36.38°N / -113.13°W
Current status: dormant (1 out of 5) | Reports
Uinkaret volcano books
Typical eruption style: effusive
Uinkaret volcano eruptions: 1100 ± 75 years (based on pottery founds)
TimeMag. / DepthDistanceLocation
Fri, 10 Aug
Fri, 10 Aug 04:54 UTCM 1.4 / 7.8 km40 km- 10km N of Beaver Dam, Arizona
Mon, 6 Aug
Mon, 6 Aug 02:29 UTCM 1.5 / 6.2 km35 km- 17km SSE of Saint George, Utah
Fri, 20 Jul
Fri, 20 Jul 03:49 UTCM 1.3 / 21.7 km40 km- 5km ENE of Fredonia, Arizona
The Uinkaret volcanic field is located at the north rim of the Grand Canyon in Arizona. It contains cinder cones that have produced lava flows that repeatedly cascaded into the Grand Canyon, forming temporary lava dams up to 200 m high. In one of these lava flows, known as the Little Springs flow, pottery sherds were found that date to between 1050 and 1200 AD giving the age of the lava flow.

Background:

Two of the most prominent landmarks are Vulcan's Throne, a 73,000 years old cinder cone on the north rim, and Vulcan's Forge, a small volcanic neck erupted within the Colorado River, 1000 m below.
Most of the Uinkaret field lies north of the Grand Canyon on the Uinkaret Plateau between the Toroweap and Hurricane faults. Most of the Uinkaret volcanic field is older than 10,000 years, but some activity has occurred even only about 1000 years ago. The lava flow from Little Springs, south of Pliocene Mount Trumbull, has a cosmogenic helium age of 1300 +/- 500 years BP. Pottery sherds dated at between 1050 and 1200 AD were found within the Little Springs lava flow, which occurred about the same time as the Sunset Crater eruption in the San Francisco volcanic field to the SE.
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Source: GVP


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