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Black Peak (Alaska)

Coordinates: 56°33′11″N 158°47′12″W / 56.5530556°N 158.7866667°W / 56.5530556; -158.7866667
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Black Peak
Highest point
Elevation3,385 ft (1,032 m) NGVD 29[1]
ListingList of volcanoes in the United States
Coordinates56°33′11″N 158°47′12″W / 56.5530556°N 158.7866667°W / 56.5530556; -158.7866667[2]
Geography
LocationAlaska Peninsula, Alaska, United States
Topo mapUSGS Chignik C-3
Geology
Mountain typeStratovolcano
Volcanic arcAleutian Arc
Last eruption1900 BCE ± 150 years

Black Peak is a highly eroded stratovolcano comprising a lava dome complex on the Alaska Peninsula of the U.S. state of Alaska.[3] Also called Purple Crater,[4] Black Volcano or Sopka Chornaia, the mountain is located within the Lake and Peninsula Borough.[2]

The latest eruption from Black Peak less than 4,000 years ago produced an explosive VEI-6 eruption that created a caldera. Ash flow tuffs and block and ash flow deposits from this explosive eruption traveled down the Ash Creek and Bluff Creek valleys that reach depths of 100 m (328 ft).

References

[edit]
  1. ^ Chignik C-3 quadrangle, Alaska (Map). 1:24000. 7.5 Minute Topographic. USGS.
  2. ^ a b "Black Peak". Geographic Names Information System. United States Geological Survey, United States Department of the Interior.
  3. ^ "Black Peak". Global Volcanism Program. Smithsonian Institution.
  4. ^ Moxham, R. M. (1952). Pumice deposits in the Alaska Peninsula-Cook Inlet region (Report). U.S. Geological Survey.