Wednesday, June 2, 2010

Antuco Volcano

Antuco Volcano is an active stratovolcano lying near Sierra Velluda, in the Bio-Bio Region of Chile. It is 9,775 ft high and is situated on the shore of Laguna del Laja. The last known eruption occurred in 1869.

The Antuco volcano geological construction was followed by edifice failure at the beginning of the Holocene that produced a large debris avalanche which traveled down the Río Laja to the west and left a large 5-km-wide horseshoe-shaped caldera breached to the west. The steep-sided modern basaltic-to-andesitic cone of has grown 1000 m since then; flank fissures and cones have also been active. Moderate explosive eruptions were recorded in the 18th and 19th centuries from both summit and flank vents, and historical lava flows have traveled into the Río Laja drainage.