Black Peak


Facts


  • Official Name: Black Peak
  • Seismically Monitored: No
  • Color Code: UNASSIGNED
  • Alert Level: UNASSIGNED
  • Elevation: 1032m (3385ft)
  • Latitude: 56.5512
  • Longitude: -158.787
  • Smithsonian VNum: 312080
  • Pronunciation:
  • Nearby Towns:
    • Chignik Lagoon 19 mi (31 km) SE
    • Chignik Lake 20 mi (33 km) SE
    • Chignik 23 mi (37 km) SE
    • Port Heiden 28 mi (45 km) NE
    • Perryville 46 mi (74 km) SW

Description

From Wood and Kienle (1990) [1] : "Black Peak is a deeply eroded, highly altered stratovolcano/dome complex with a small caldera at its eastern edge. The caldera is ice-free and contains two small lakes; most of the interior of the caldera is occupied by a complex of nested dacitic domes. The volcano rests on a north-dipping basement of Pliocene volcanogenic non-marine sedimentary rocks.
"The flows, domes, and volcaniclastic rocks that make up the pre-caldera cone range in composition from andesite to dacite. Dacitic ash-flow tuffs and coarse block-and-ash flows fill the Bluff and Ash Creek valleys to as much as 100 m on the north and west sides of the volcano. The pyroclastic flows that deposited these tuffs had limited distribution and appear to have been relatively sluggish; they also appear to have had a large air-fall component, judging from the crude stratification in the ash-flow tuff. In spite of the caldera's small diameter, the widespread climactic air fall and the thickness of the ash-flow tuffs suggest a bulk eruption volume of >10 cubic km."

Name Origin

The name "Black Peak" is a translation of the Russian name "So[pka] Chornaia," published by Captain Tebenkov in 1852 (Orth, 1971).


References Cited

[1] Volcanoes of North America: United States and Canada, 1990

Wood, C. A., and Kienle, Juergen, (eds.), 1990, Volcanoes of North America: United States and Canada: New York, Cambridge University Press, 354 p.

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