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Black Peak volcano

Stratovolcano 1032 m / 3,386 ft
United States, Alaska Peninsula, 56.55°N / -158.79°W
Current status: dormant (1 out of 5) | Reports
Black Peak volcano books
Typical eruption style: unspecified
Black Peak volcano eruptions: 1900 BC ± 150 years
TimeMag. / DepthDistanceLocation
Wed, 11 Jul
Wed, 11 Jul 19:58 UTCM 3.3 / 12 km22 km ALASKA PENINSULA

Background:

The highly eroded stratovolcano and lava dome complex of Black Peak was constructed within an ice-free mid-Holocene caldera with two small caldera lakes on the northern and eastern sides. The pre-caldera volcano consists of andesitic-dacitic lava domes, lava flows, and volcaniclastic rocks that were constructed over a basement of Pliocene volcanogenic sedimentary rocks. Ash-flow tuffs and block-and-ash-flow deposits from the >10 cu km caldera-forming eruption, which occurred less than about 4000 years ago, fill the Ash Creek and Bluff Creek valleys to the west and north to depths of as much as 100 m. Most of the 3.5-km-wide caldera floor is occupied by a complex of nested dacitic lava domes and associated lava flows centered in the southern part of the caldera.
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Smithsonian / GVP volcano information

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