Manahan Peak is a prominent 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...

 1 nautical mile (1.9 km) east of Giggenbach Ridge

Giggenbach Ridge

Giggenbach Ridge is a north-south chain of summits, 5 nautical miles long, located to the west and northwest of Mount Terror on Ross Island. The ridge rises to c.2400 m west of Mount Terror, but descends to 1320 m at the north end.-Namesake:...

 in northeast Ross Island

Ross Island

Ross Island is an island formed by four volcanoes in the Ross Sea near the continent of Antarctica, off the coast of Victoria Land in McMurdo Sound.-Geography:...

. The peak rises to over 2000 m 2.6 nautical miles (4.8 km) northwest of the summit of Mount Terror

Mount Terror (Antarctica)

Mount Terror is a large shield volcano that forms the eastern part of Ross Island, Antarctica. It has numerous cinder cones and domes on the flanks of the shield and is mostly under snow and ice. It is the second largest of the four volcanoes which make up Ross Island and is somewhat overshadowed...

. 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) (2000) after biologist Donal T. Manahan

Donal T. Manahan

Donal Thomas Manahan is an Irish-born American marine scientist and comparative physiologist known for Antarctic and deep oceanic research on the physiology and ecology of marine invertebrates and their larvae in extreme environments....

, who worked eight seasons in Antarctica from 1983; United States Antarctic Program

United States Antarctic Program

United States Antarctic Program is an organization of the United States government which has presence in the continent of Antarctica. It co-ordinates research and the operational support for research in the region...

 (USAP) prinicipal investigator in study of early stages (embryos larvae) of marine animals; chair, Polar Research Board, National Academy

National academy

A national academy is an organizational body, usually operating with state financial support and approval, that co-ordinates scholarly research activities and standards for academic disciplines, most frequently in the sciences but also the humanities. Typically the country's learned societies in...

of Sciences, 2000.