Featured volcano : Ambrym, Vanuatu

Last update: July 20, 2012 at 6:32 pm by By

Ambrym, a large basaltic volcano with a 12-km-wide caldera, is one of the most active volcanoes of the New Hebrides arc. A thick, almost exclusively pyroclastic sequence, initially dacitic, then basaltic, overlies lava flows of a pre-caldera shield volcano. The caldera was formed during a major … [Read more...]