Black Peak (Alaska)

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Black Peak
Black Peak.jpg
Highest point
Elevation 3,385 ft (1,032 m)  NGVD 29 [1]
Listing List of volcanoes in the United States
Coordinates 56°33′11″N158°47′12″W / 56.5530556°N 158.7866667°W / 56.5530556; -158.7866667 [2]
Geography
Relief map of USA Alaska.png
Red triangle with thick white border.svg
Black Peak
Location in Alaska
Location Alaska Peninsula, Alaska, United States
Topo map USGS Chignik C-3
Geology
Formed by Subduction zone volcanism
Mountain type Stratovolcano
Volcanic arc Aleutian Arc
Last eruption 1900 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

  1. ↑ Chignik C-3 quadrangle, Alaska (Map). 1:24000. 7.5 Minute Topographic. USGS.
  2. 1 2 "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.


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