The Keystone Cliffs () are a set of cliffs, high, marking the east face of the sedimentary ridge between

Mercury Glacier Mercury Glacier () is a glacier on the east coast of Alexander Island, Antarctica, long and wide, flowing east into George VI Sound between the Waitabit Cliffs and Keystone Cliffs. The glacier was probably first sighted from a distance by Lin ...

and

Venus Glacier Venus Glacier () is a glacier on the east coast of Alexander Island, Antarctica, 10 nautical miles (18 km) long and 6 nautical miles (11 km) wide at its mouth flowing east into George VI Sound lying between Keystone Cliffs and Triton P ...

, on the east coast of Alexander Island,

Antarctica Antarctica () is Earth's southernmost and least-populated continent. Situated almost entirely south of the Antarctic Circle and surrounded by the Southern Ocean, it contains the geographic South Pole. Antarctica is the fifth-largest contine ...

. The coast in this vicinity was first seen from the air by Lincoln Ellsworth on November 23, 1935, and roughly mapped from photos obtained on that flight by

W.L.G. Joerg Wolfgang Louis Gottfried Joerg, better known as W. L. G. Joerg (February 6, 1885 – January 7, 1952) was an American geographer, and in particular an expert in the geography of the Arctic and Antarctic regions, who exercised broad influence on the ...

. The cliffs were roughly surveyed in 1936 by the British Graham Land Expedition and resurveyed in 1948 by the

Falkland Islands Dependencies Survey The British Antarctic Survey (BAS) is the United Kingdom's national polar research institute. It has a dual purpose, to conduct polar science, enabling better understanding of global issues, and to provide an active presence in the Antarctic on ...

(FIDS). They were so named by the FIDS because the geologic structures revealed in these cliffs provided the key to the general tectonic structure of the area.

References

Cliffs of Alexander Island {{AlexanderIsland-geo-stub

See also

References