Mount Eissinger is a large ridge-like mountain

Mountain

Image:Himalaya_annotated.jpg|thumb|right|The Himalayan mountain range with Mount Everestrect 58 14 160 49 Chomo Lonzorect 200 28 335 52 Makalurect 378 24 566 45 Mount Everestrect 188 581 920 656 Tibetan Plateaurect 250 406 340 427 Rong River...

 at the north side of Riley Glacier

Riley Glacier

Riley Glacier is a heavily crevassed glacier, 14 nautical miles long and 17 nautical miles wide, flowing westward from the west side of Palmer Land into George VI Sound between the Traverse Mountains and Mount Dixey. First sighted and surveyed in 1936 by the British Graham Land Expedition under...

 on the west side of Palmer Land

Palmer Land

Palmer Land is that portion of the Antarctic Peninsula which lies south of a line joining Cape Jeremy and Cape Agassiz. This application of Palmer Land is consistent with the 1964 agreement between US-ACAN and UK-APC, in which the name Antarctic Peninsula was approved for the major peninsula of...

. The feature has a snow-topped upper surface, bare rock cliffs along the north side, and an impressive rectangular rock buttress rises in an unbroken, near-vertical sweep from the glacier

Glacier

A glacier is a large persistent body of ice that forms where the accumulation of snow exceeds its ablation over many years, often centuries. At least 0.1 km² in area and 50 m thick, but often much larger, a glacier slowly deforms and flows due to stresses induced by its weight...

 to 500 m at the west end. Mapped by the United States Geological Survey

United States Geological Survey

The United States Geological Survey is a scientific agency of the United States government. The scientists of the USGS study the landscape of the United States, its natural resources, and the natural hazards that threaten it. The organization has four major science disciplines, concerning biology,...

 (USGS) in 1974. Named by Advisory Committee on Antarctic Names

Advisory Committee on Antarctic Names

The Advisory Committee on Antarctic Names is an advisory committee of the United States Board on Geographic Names responsible for recommending names for features in Antarctica...

 (US-ACAN) for Karlheinz Eissinger, USGS topographic engineer with the Ellsworth Land Survey party, 1968-69.