Volcano Type:      Stratovolcano
Volcano Status:    Historical
Last Known Eruption:     2008
Summit Elevation:     2745 m     9,006 feet
Latitude:     53.106°S     53°6’20″S
Longitude:     73.513°E     73°30’45″E

Heard Island on the Kerguelen Plateau in the southern Indian Ocean consists primarily of the emergent portion of two volcanic structures. The large glacier-covered composite basaltic-to-trachytic cone of Big Ben comprises most of the island, and the smaller Mt. Dixon volcano lies at the NW tip of the island across a narrow isthmus. Little is known about the structure of Big Ben volcano because of its extensive ice cover. The historically active Mawson Peak forms the island’s 2745-m high point and lies within a 5-6 km wide caldera breached to the SW side of Big Ben. Small satellitic scoria cones are mostly located on the northern coast. Several subglacial eruptions have been reported in historical time at this isolated volcano, but observations are infrequent and additional activity may have occurred.

Heard Island

Click Here For The Rest Of Heard Island, Australia

Originally posted 2010-08-30 04:42:00.