Pillow Rock () is an insular rock forming the easternmost element of
Hauge Reef
Hauge Reef is a chain of islands and rocks extending in an east-northeast direction from the eastern extremity of Annenkov Island to a point about west-southwest of Cape Darnley, South Georgia. It was first charted in 1819 by a Russian expeditio ...
, lying 3.3 nautical miles (6 km) west of
Cape Darnley,
South Georgia
South Georgia ( es, Isla San Pedro) is an island in the South Atlantic Ocean that is part of the British Overseas Territory of South Georgia and the South Sandwich Islands. It lies around east of the Falkland Islands. Stretching in the east†...
. So named following
British Antarctic 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 ...
(BAS) geological work, 1975–76, from the
pillow lava
Pillow lavas are lavas that contain characteristic pillow-shaped structures that are attributed to the extrusion of the lava underwater, or ''subaqueous extrusion''. Pillow lavas in volcanic rock are characterized by thick sequences of disconti ...
s that compose the feature.
Rock formations of Antarctica
{{SouthGeorgia-geo-stub