(also Edsel Ford Ranges), mountains in the northwestern part of Marie Byrd Land in western Antarctica between 140° and 149° W long. The mountains are composed of me-tamorphized terrigenous and carbonate deposits, as well as granodiorites and granite. The greater part is covered by glacial ice. Individual peaks, which are divided by deep depressions with valley glaciers, rise above the glacial surface to a maximum elevation of 1,370 m at Mt. Avers. They were discovered in 1929 by an American expedition led by R. Byrd. They were named in honor of Edsel Ford, who provided financial support for the expedition.