Mount Marr is a rock peak

Summit (topography)

In topography, a summit is a point on a surface that is higher in elevation than all points immediately adjacent to it. Mathematically, a summit is a local maximum in elevation...

 which rises above the surrounding ice surface 8 nautical miles (15 km) south of Johnston Peak

Johnston Peak

Johnston Peak is a sharp dark peak, 7 nautical miles north of Mount Marr and 11 nautical miles northwest of Douglas Peak. It was discovered in January 1930 by the British Australian New Zealand Antarctic Research Expedition under Mawson, who named it for Professor T. Harvey Johnston, the chief...

 and 8 nautical miles (15 km) west of Douglas Peak

Douglas Peak

Douglas Peak is a peak, 1,525 m, lying 11 nautical miles southwest of Mount Codrington and 8 nautical miles east of Mount Marr. It was discovered in January 1930 by the British Australian New Zealand Antarctic Research Expedition under Mawson, and named for Flight Lieutenant E. Douglas, RAAF, a...

, in Enderby Land

Enderby Land

Enderby Land is a projecting land mass of Antarctica, extending from Shinnan Glacier at to William Scoresby Bay at .Enderby Land was discovered in February 1831 by John Biscoe in the whaling brig Tula, and named after the Enderby Brothers of London, owners of the Tula, who encouraged their...

. It was discovered in January 1930 by the British Australian New Zealand Antarctic Research Expedition (BANZARE) under Douglas Mawson

Douglas Mawson

Sir Douglas Mawson, OBE, FRS, FAA was an Australian geologist, Antarctic explorer and Academic. Along with Roald Amundsen, Robert Falcon Scott, and Ernest Shackleton, Mawson was a key expedition leader during the Heroic Age of Antarctic Exploration.-Early work:He was appointed geologist to an...

 and was named after James W.S. Marr, a zoologist on the expedition, whose services were lent to BANZARE by the British Discovery Investigations Committee.