The Helo Cliffs are a set of
cliff
In geography and geology, a cliff is an area of rock which has a general angle defined by the vertical, or nearly vertical. Cliffs are formed by the processes of weathering and erosion, with the effect of gravity. Cliffs are common on co ...
s at about on the north rim of the summit
caldera
A caldera ( ) is a large cauldron-like hollow that forms shortly after the emptying of a magma chamber in a volcano eruption. When large volumes of magma are erupted over a short time, structural support for the rock above the magma chamber is ...
of
Mount Erebus
Mount Erebus () is the second-highest volcano in Antarctica (after Mount Sidley), the highest active volcano in Antarctica, and the southernmost active volcano on Earth. It is the sixth-highest ultra mountain on the continent.
With a summ ...
, on
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 ...
, Antarctica.
[ The name derives from a nearby ]U.S. Coast Guard
The United States Coast Guard (USCG) is the maritime security, search and rescue, and law enforcement service branch of the United States Armed Forces and one of the country's eight uniformed services. The service is a maritime, military, multi ...
HH-52A
The Sikorsky HH-52 Seaguard (company designation S-62) was an early amphibious helicopter designed and produced by the American helicopter manufacturer Sikorsky Aircraft. It was the first of the company's amphibious rotorcraft to fly.
The S-6 ...
helicopter (CG 1404), which crashed on the east slope of Mount Erebus while en route to Cape Bird
Cape Bird () is a cape which marks the north extremity of Ross Island in Antarctica. It was discovered in 1841 by a British expedition under James Clark Ross, and named by him after Lieutenant Edward J. Bird of the ship HMS ''Erebus''.
Cape Bird ...
from 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 ...
on January 9, 1971. The helicopter lost power in flight and was damaged when it landed. The four crew and passengers were not injured. The helicopter was abandoned because of its location (U.S. Navy Task Force 43, 1971).
References
Cliffs of Ross Island
{{RossIsland-geo-stub