Viedma volcan

Viedma est un volcan sous la Patagonie champ de glace NW de Viedma Lake en Argentine du Sud. Son existence a été confirmée lors de l'éruption en 1988. Seules les parties du volcan s'élèvent au-dessus des glaciers.

Introduction:

from Smithsonian / GVP volcano information:
The Volcán Viedma eruptive center is a subglacial dacitic volcano beneath the Patagonian Icecap west of the spectacular granitic spires of the Cerro Torre, Cerro Fitz Roy area.
Only part of the older edifice rises above the surface of the icecap. 4 large craters or calderas between 1.5 and 4 km in diameter are located along a N-S line.

1988 Eruption
The 1988 eruption generated deposits of ash and pumice on the Patagonian
glacier and produced a mud-flow that reached the Viedma Lake