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Neptune


Facts

  • Seismically Monitored: No
  • Color Code:
  • Alert Level:
  • Elevation: 681m (2234ft)
  • Latitude: 54.737085
  • Longitude: -164.485754
  • Smithsonian VNum:
  • Pronunciation:
  • Nearby Towns:
    • False Pass 44 mi (70 km) NE
    • Akutan 66 mi (107 km) SW
    • Pauloff Harbor 74 mi (119 km) SE
    • Cold Bay 77 mi (123 km) NE
    • King Cove 89 mi (144 km) NE

    Distance from Anchorage: 695 mi (1118 km)

Description

From Stelling and others, 2005 [1] : "An isolated polygenetic stratocone outside the caldera to the northwest, here named Neptune Cone ("NC") lacks deposits from the caldera-forming eruption, suggesting a Holocene age. The most recent eruption from this cone was a fissure eruption that produced a ~4 km-long linear ridge of basaltic (49 wt.% SiO2, Mg#=0.57), scoria and spatter, extending to the north of the cone ("arm" extending from Neptune Cone)."

References Cited

[1] Eruptive history of Fisher Caldera, Alaska, USA, 2005

Stelling, P., Gardner, J. E., and Beget, J., 2005, Eruptive history of Fisher Caldera, Alaska, USA: Journal of Volcanology and Geothermal Research, v. 139, no. 3-4, p. 163-183.

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