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Ubehebe Craters volcan

explosion craters (maars) 752 m / 2,467 ft
California, USA (mainland exept Alaska), 37.02°N / -117.45°W
Condition actuelle: normal / en sommeil (1 sur 5) | Reports
Ubehebe Craters livres
Style éruptif tipique: Explosive
Eruptions du volcan Ubehebe Craters: 4050 BC (?)
HeureMag. / DepthDistanceLocation
Tue, 19 Nov 2019
Tue, 19 Nov 13:43 UTCM 1.2 / 5.6 km16 km63km SSW of Goldfield, Nevada (USA)
Sat, 16 Nov 2019
Sat, 16 Nov 09:23 UTCM 1.024 km60km W of Beatty, Nevada (USA)
Sat, 16 Nov 05:04 UTCM 1.023 km58km W of Beatty, Nevada (USA)
Fri, 15 Nov 2019
Fri, 15 Nov 07:49 UTCM 0.6 / 8.5 km1 km63km W of Beatty, Nevada (USA)
Tue, 12 Nov 2019
Tue, 12 Nov 21:10 UTCM 0.68 km63km NE of Lone Pine, California (USA)
Voir tous
Cratères Ubehebe sont un groupe de maars (cratères d'explosion) formé à la marge occidentale de la montagne de Tin, en Californie.

Introduction:

The Ubehebe Craters consist of an isolated group of overlapping maars formed during eruptions of alkali basalt along a fault cutting fanglomerate deposits on the flanks of Tin Mountain in Death Valley National Park. Ubehebe Crater is a 0.8-km-wide, 235-m-deep maar surrounded by a tuff ring. Little Hebe Crater, the second youngest vent, is located immediately south of Ubehebe Crater and is a small tuff cone with a 100-m-wide crater overlain by pyroclastic-surge deposits. At least a dozen craters are located within an area of 3 sq km, and bedded pyroclastic-surge deposits cover an area of 15 sq km. Early scoria cone formation was followed by hydrovolcanic explosions that formed two clusters of explosion craters and tuff rings. The age of volcanism at Ubehebe is not dated precisely, but the lack of erosional modification of pyroclastic-surge deposits suggests that the youngest activity, from the largest crater, Ubehebe Crater, is Holocene in age. Relationships between Ubehebe tephra and approximately dated archeological artifacts suggests an age of about 6000 years.
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from: GVP Ubehebe Craters information


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