Volcano Type: Caldera
Volcano Status: Holocene
Last Known Eruption: Unknown
Summit Elevation: 2320 m 7,611 feet
Latitude: 7.18°N 7°11’0″N
Longitude: 38.43°E 38°26’0″E
Lake Awassa
The 15-km-wide Corbetti caldera overlaps the NW margin of the older 30 x 40 km Awasa caldera. Urji volcano was subsequently constructed in the center of Corbetti caldera, which also contains young lava flows. Chabbi volcano, a large obsidian dome that grew on the SE caldera rim, has erupted lava flows onto the caldera floor. The age of the latest eruptive activity at Corbetti caldera is not known, although many lava flows are too young to date by the Potassium-Argon method. Fumarolic activity continues at the post-caldera cones of Urji, Chabbi, and an unnamed pyroclastic cone on the west rim.
Lake Awassa
Lake Awassa
Chabbi volcano, rising to the north across Awasa lake, is a very large obsidian dome constructed on the SE rim of the 15-km-wide Corbetti caldera, which itself lies within the NW side of the larger Awasa caldera. In this photo Corbetti caldera is out of view behind its southern rim, which forms the low saddle at the left. Lava flows from Chabbi extend into Corbetti caldera. The age of the latest eruption of Corbetti volcano is not known, although fumarolic activity continues.
Sunset over Lake Awassa
Sunset in Awassa Lake
The Corbetti Caldera area, a recent volcanic complex in the Main Ethiopian Rift Valley, is described. In the area, most of the volcanic products are peralkaline pyroclastics (ignimbrites and pumice). The volcanological history of this complex has been reconstructed. It comprises fissure eruptions, which were followed by a volcano-tectonic collapse.
Main Ethiopian Rift Valley (Christoph Hormann)
Main Ethiopian Rift Valley
Location of Corbetti Caldera
Originally posted 2010-09-08 12:02:48.
