Information About

Threequarter Cone

Threequarter Cone

Quick Facts
Region:
  • Aleutians West (CA)
Nearest City:
About

On the W wall of the caldera in the central part of Semisopochnoi Island, 2 mi NW of Mount Cerberus, Aleutian Islands.

History of Threequarter Cone

So named in 1950 by R. R. Coats, U.S. Geological Survey (USGS), because "part of the cone has been removed in the formation of the caldera."