The precise mapping of its overall features was accomplished from United States Navy air photographs and surveys by New Zealand and American parties in the 1950s and 1960s.

A large active volcano predominantly buried in ice, with several peaks reaching an estimated 2,600 metres (8,500 ft), It is included within Antarctic Specially Protected Area 175 High Altitude Geothermal Sites of the Ross Sea Region.

Fumaroles and geothermally heated ground occur within a single outcrop at the summit of Mount Rittmann in a minor caldera rim at approximately 2,000 metres (6,600 ft) above sea level.

A high, ice-covered ridge along the south side of the head of Gair Glacier, standing 6 nautical miles (11 km; 6.9 mi) southeast of Mount Supernal.

A large, rounded mountain 2,180 metres (7,150 ft) high on the south side of upper Meander Glacier, 5 nautical miles (9.3 km; 5.8 mi) southeast of Hobbie Ridge.

A small mountain 2,640 metres (8,660 ft) high situated 3 nautical miles (5.6 km; 3.5 mi) north of Mount Supernal.

A mountain 2,680 metres (8,790 ft) high along the north side of Gair Glacier 8.5 nautical miles (15.7 km; 9.8 mi) east of Mount Supernal.

A small parasite cone on the northwest flank of Mount Overlord, 6.5 nautical miles (12.0 km; 7.5 mi) distant from the latter's summit, in the Mountaineer Range.

A very large mountain 3,395 metres (11,138 ft) high which is an extinct volcano, situated at the northwest limit of Deception Plateau and just east of the head of Aviator Glacier.

A mountain 2,780 metres (9,120 ft) high surmounting the southwest edge of Deception Plateau, 8 nautical miles (15 km; 9.2 mi) south of Mount Overlord.

Named by US-ACAN for Lieutenant Commander William E. Shockley, United States Navy, officer in charge of the Squadron VX-6 winter detachment at McMurdo Station, 1966.

It was discovered in January 1841 by Sir James Clark Ross who named this peak for Thomas Spring Rice, 1st Baron Monteagle of Brandon, Chancellor of the Exchequer from 1835 to 1839.

A mountain 2,460 metres (8,070 ft) high surmounting the east wall of Aviator Glacier 10 nautical miles (19 km; 12 mi) north of Mount Monteagle.

A mountain 2,100 metres (6,900 ft) high at the north side of the head of Oakley Glacier, 5 nautical miles (9.3 km; 5.8 mi) east-northeast of Mount Monteagle.

Named by US-ACAN for Lieutenant Dennis Casey, United States Navy Reserve, Catholic chaplain with the winter party at McMurdo Station, 1967.

Named by US-ACAN after Lieutenant Commander Jack O. Moriarty, United States Navy, air operations officer at McMurdo Station, winter party 1966.