The Blackwall Mountains in Antarctica rise to 1370 metre, extending in a west-northwest–east-southeast direction for 5 miles (8 km) and lying close south of Neny Fjord

Neny Fjord

Neny Fjord is a fjord which is 10 miles long in an east-west direction and 5 miles wide, between Red Rock Ridge and Roman Four Promontory on the west coast of Graham Land, Antarctica.-History:...

 on the west coast of Graham Land

Graham Land

Graham Land is that portion of the Antarctic Peninsula which lies north of a line joining Cape Jeremy and Cape Agassiz. This description of Graham Land is consistent with the 1964 agreement between the British Antarctic Place-names Committee and the US Advisory Committee on Antarctic Names, in...

. They are bounded to the east by Remus Glacier

Remus Glacier

Remus Glacier is a glacier, 8 nautical miles long, which flows from the north slopes of Mount Lupa northwestward along the northeast side of the Blackwall Mountains into Providence Cove, Neny Fjord, on the west coast of Graham Land. The lower reaches of the glacier were first roughly surveyed in...

, to the south by Romulus Glacier

Romulus Glacier

Romulus Glacier is a glacier, 7 nautical miles long and 2 nautical miles wide, which flows from the north slopes of Mount Lupa westward to Rymill Bay between the Blackwall Mountains and Black Thumb, on the west coast of Graham Land. First surveyed in 1936 by the British Graham Land Expedition ...

, and are separated from Red Rock Ridge

Red Rock Ridge

Red Rock Ridge or Morro Roca Roja or Promontorio Roca Roja is a conspicuous reddish-colored ridge or promontory which rises to 690 m and projects from the west coast of Graham Land between Neny Fjord and Rymill Bay. Red Rock Ridge is located at and has an elevation of 690 m...

 to the west by Safety Col

Safety Col

Safety Col is a snow-covered col, 185 m high, between Red Rock Ridge and the Blackwall Mountains, on the west coast of Graham Land. First surveyed in 1936 by the British Graham Land Expedition under Rymill...

. First 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...

 under Rymill, they were re-surveyed in 1948–49 by the Falkland Islands Dependencies Survey, and so named by them because the black cliffs of the mountains facing Rymill Bay

Rymill Bay

Rymill Bay is a bay in Antarctica. It is nine miles wide at its mouth and indents five miles between Red Rock Ridge and Bertrand Ice Piedmont along the west coast of Graham Land. Rymill Bay was probably first seen from a distance by the French Antarctic Expedition under Jean-Baptiste Charcot in 1909...

remain snow free throughout the year.