Moffett Glacier is a tributary 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...

, 13 nautical miles (24 km) long, flowing east from Rawson Plateau

Rawson Plateau

The Rawson Plateau is an ice-covered plateau, long and high, rising between the heads of Bowman Glacier, Moffett Glacier and Steagall Glacier in the Queen Maud Mountains. It was mapped by the Byrd Antarctic Expedition , 1928–30, and by the U.S. Geological Survey from surveys and from U.S. Navy...

 to enter Amundsen Glacier

Amundsen Glacier

Amundsen Glacier is a major Antarctic glacier, about 6 to 10 km wide and 128 km long, originating on the polar plateau where it drains the area to the south and west of Nilsen Plateau, and descending through the Queen Maud Mountains to enter the Ross Ice Shelf just west of the...

 just south of Mount Benjamin

Mount Benjamin

Mount Benjamin is a prominent mountain, 1,750 m, rising sharply at the west side of Amundsen Glacier, 5 nautical miles southeast of Mount Ellsworth, in the Queen Maud Mountains. First seen and mapped by the Byrd Antarctic Expedition, 1928-30. Named by Advisory Committee on Antarctic Names for...

, in the Queen Maud Mountains

Queen Maud Mountains

The Queen Maud Mountains are a major group of mountains, ranges and subordinate features of the Transantarctic Mountains, lying between the Beardmore and Reedy Glaciers and including the area from the head of the Ross Ice Shelf to the polar plateau in Antarctica...

. Discovered by R. Admiral Byrd on the South Pole

South Pole

The South Pole, also known as the Geographic South Pole or Terrestrial South Pole, is one of the two points where the Earth's axis of rotation intersects its surface. It is the southernmost point on the surface of the Earth and lies on the opposite side of the Earth from the North Pole...

 flight of November 28–29, 1929, and named by him for R. Admiral William A. Moffett, U.S. Navy, first Chief of the Bureau of Aeronautics, Dept. of the Navy.