Keystone Cliffs
Encyclopedia
Keystone Cliffs is a set of cliffs, 610 m, marking the east face of the sedimentary ridge between Mercury and Venus Glaciers, on the east coast of Alexander Island
. 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. The cliffs were roughly surveyed in 1936 by the British Graham Land Expedition
(BGLE) and resurveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS). So named by the FIDS because the geologic structures revealed in these cliffs provided the key to the general tectonic structure of the area.
Alexander Island
Alexander Island or Alexander I Island or Alexander I Land or Alexander Land is the largest island of Antarctica, with an area of lying in the Bellingshausen Sea west of the base of the Antarctic Peninsula, from which it is separated by Marguerite Bay and George VI Sound. Alexander Island lies off...
. The coast in this vicinity was first seen from the air by Lincoln Ellsworth
Lincoln Ellsworth
Lincoln Ellsworth was an arctic explorer from the United States.-Birth:He was born on May 12, 1880 to James Ellsworth and Eva Frances Butler in Chicago, Illinois...
on November 23, 1935, and roughly mapped from photos obtained on that flight by W.L.G. Joerg. The cliffs were roughly surveyed in 1936 by the British Graham Land Expedition
British Graham Land Expedition
A British expedition to Graham Land led by John Lachlan Cope took place between 1920 and 1922. The British Graham Land Expedition was a geophysical and exploration expedition to Graham Land in Antarctica between 1934 to 1937. Under the leadership of John Riddoch Rymill, the expedition spent two...
(BGLE) and resurveyed in 1948 by the Falkland Islands Dependencies Survey (FIDS). So named by the FIDS because the geologic structures revealed in these cliffs provided the key to the general tectonic structure of the area.