Mount Andrus
Andrus
Vulcano a scudo · Antarctica · 2978 m
- Tipo
- Vulcano a scudo
- Paese
- Antarctica
- Regione
- Antarctic-Scotia Volcanic Regions / Western Antarctica Volcanic Province
- Altitudine
- 2978 m
- Coordinate
- -75.800, -132.330
- Ultima eruzione
- Sconosciuto
- Contesto tettonico
- Intraplate / Continental crust (> 25 km)
- Forma vulcanica
- Shield
- Roccia principale
- Trachyte / Trachydacite
Sintesi geologica
Three coalescing trachytic shield volcanoes with a combined volume of 252 km3 formed during the Miocene along a N-S line in the Ames Range of western Marie Byrd Land. The youngest and best exposed 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.
Sintesi da Wikipedia
Riassunto in ingleseMount Andrus is a peak 2 nautical miles southeast of Mount Boennighausen in the southeast extremity of the Ames Range, in Marie Byrd Land, Antarctica.
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