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Subregion Name: | Antarctica | |
| Volcano Number: | 1900-023 | ||
| Volcano Type: | Shield volcanoes | ||
| Volcano Status: | Holocene? | ||
| Last Known Eruption: | Unknown | ||
| Summit Elevation: | 2978 m | 9,770 feet | |
| Latitude: | 75.80°S | 75°48'0"S | |
| Longitude: | 132.33°W | 132°20'0"W | |
| Three coalescing trachytic shield volcanoes with a combined volume of 252 cu km formed during the Miocene along a north-south line in the Ames Range of western Marie Byrd Land. The youngest and best exposed of the three is Mount Andrus, the southernmost volcano, where late-stage volcanic activity resumed during the late-Pleistocene or Holocene (Gonzalez-Ferran and Gonzalez-Bonorino 1972, LeMasurier and Thomson 1990). A distinct 4.5-km-wide caldera truncates the summit of Mount Andrus. Weak fumarolic activity was observed in 1977 at Mount Kauffman, the northernmost volcano, which also has a morphologically distinct 3-km-wide summit caldera. | |||
