Ubehebe Craters Vulkan, California (Canada and USA (mainland))

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Ubehebe Craters Vulkan

explosion craters (maars) 752 m / 2,467 ft
California, USA (mainland exept Alaska), 37.02°N / -117.45°W
Aktueller Status: nicht aktiv (1 von 5)

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Typische Aktivität: Explosiv
Ausbrüche des Ubehebe Craters: 4050 BC (?)
Letzte Erdbeben in der Nähe:

Zeit	Mag. / Tiefe	Distance	Ort
Fri, 17 May
Fri, 17 May 23:07 UTC	M 1.2 / 9.2 km	2 km	64km W of Beatty, Nevada
Thu, 16 May
Thu, 16 May 23:53 UTC	M 0.8 / 8 km	16 km	53km WNW of Beatty, Nevada
Thu, 16 May 23:53 UTC	M 0.6 / 9.2 km	21 km	57km SSW of Goldfield, Nevada
Wed, 15 May
Wed, 15 May 15:31 UTC	M 2 / 11.9 km	18 km	61km WNW of Beatty, Nevada
Wed, 15 May 15:31 UTC	M 1.8 / 6.9 km	15 km	61km WNW of Beatty, Nevada

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Ubehebe Craters volcano is a group of maars (explosion craters) located at the western margin of Tin Mountain, California, in the northern end of Death Valley. The craters were thought to have last erupted about 6000 years ago, but a recent study suggests that some activity could have occurred as little as 800 years ago.

Beschreibung:

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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