Twin Crater

Twin Crater () is a

volcanic crater A volcanic crater is an approximately circular depression in the ground caused by Volcano, volcanic activity. It is typically a bowl-shaped feature containing one or more vents. During Types of volcanic eruptions, volcanic eruptions, molten magm ...

with twin nested cones that rises behind

McMurdo Station McMurdo Station is a United States Antarctic research station on the south tip of Ross Island, which is in the New Zealand-claimed Ross Dependency on the shore of McMurdo Sound in Antarctica. It is operated by the United States through the Unit ...

and 0.5 nautical miles (0.9 km) west of

Crater Hill Crater Hill is one of the volcanoes of the Auckland volcanic field, in New Zealand. It consists of an explosion crater about wide, partly filled with water. The hill, alongside Māngere Lagoon, Waitomokia, Kohuora, Pukaki Lagoon and Robertson H ...

Hut Point Peninsula Hut Point Peninsula () is a long, narrow peninsula from wide and long, projecting south-west from the slopes of Mount Erebus on Ross Island, Antarctica. McMurdo Station (US) and Scott Base (NZ) are Antarctic research stations located on the ...

Ross Island Ross Island is an island formed by four volcanoes in the Ross Sea near the continent of Antarctica, off the coast of Victoria Land in McMurdo Sound. Ross Island lies within the boundaries of Ross Dependency, an area of Antarctica claimed by New ...

. This crater was named Middle Crater by

Frank Debenham Frank Debenham, OBE (26 December 1883 – 23 November 1965) was Emeritus Professor of Geography at the Department of Geography, Cambridge University and first director of the Scott Polar Research Institute. Biography Debenham was born in B ...

of the British Antarctic Expedition, 1910–13, apparently for its location in relation to First Crater and Crater Hill, but the name has fallen into disuse. Twin Crater, alluding to the nested cones in the crater, was applied as early as 1971 and the name has become established because of consistent use in current maps and reports. Black Knob, a big black rock outcrop lies 0.2 nautical miles (0.4 km) east of Twin Crater. Volcanoes of Ross Island Volcanic craters {{RossIsland-geo-stub