A steep moraine-filled valley which descends northward from Midnight Plateau between Colosseum Ridge and Exodus Glacier.

A steep, smooth glacier 1 nautical mile (1.9 km; 1.2 mi) northeast of Mount Ellis, flowing from the north edge of Midnight Plateau to the southwest side of Island Arena.

A rocky ridge, 6 nautical miles (11 km; 6.9 mi) long, which descends eastward from the northeast end of Midnight Plateau.

Named after Mason E. Hale (d.), lichenologist, National Museum of Natural History (Smithsonian), Washington, DC, who worked about six austral summers in the McMurdo Dry Valleys beginning c.1980.

Named after Christopher P. McKay, physicist, NASA Ames Research Center, Moffett Field, CA, who carried out investigations in McMurdo Dry Valleys (micrometeorology, thickness of ice in frozen lakes, stability of ground ice) in 15 austral summers beginning c.1980.

At 2,000 metres (6,600 ft) high, the feature is similar in elevation and aspect to Skilton Ledge, 1 nautical mile (1.9 km; 1.2 mi) to the east.

Named in association with Richard Chapman Johnson of Nazareth, PA, radio operator involved for 16 years (1985-2001) in coordinating MARSgrams and Polarmail which have enabled personnel in Antarctica to communicate with home.

The upper surface 2,070 metres (6,790 ft) high is ice covered but a rock cliff forms the south end.

Named after Larry Skilton, Connecticut ham radio operator who made phone patches in the United States to complete radio communications from United States Antarctic Project (USAP) science stations including Palmer, McMurdo, Byrd surface station, and particularly South Pole.

[13] This article incorporates public domain material from websites or documents of the United States Geological Survey.