Radok Lake is a meltwater

Meltwater

Meltwater is the water released by the melting of snow or ice, including glacial ice and ice shelfs over oceans. Meltwater is often found in the ablation zone of glaciers, where the rate of snow cover is reducing...

 lake

Lake

A lake is a body of relatively still fresh or salt water of considerable size, localized in a basin, that is surrounded by land. Lakes are inland and not part of the ocean and therefore are distinct from lagoons, and are larger and deeper than ponds. Lakes can be contrasted with rivers or streams,...

 about 4 mi long and marked by a slender 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...

 tongue feeding into it from the west, lying 3 mi south-west of Beaver Lake

Beaver Lake (Antarctica)

Beaver Lake is a lake of smooth ice, 7 mi long and 5 mi wide, enclosed on the south and east by Flagstone Bench and Jetty Peninsula. The lake is situated at the south end of an area of rough ice , 17 mi ESE of Aramis Range, Prince Charles Mountains. Discovered by Australian National Antarctic...

 and 15 mi south-east of the Aramis Range

Aramis Range

Aramis Range is the third range south in the Prince Charles Mountains, situated 11 miles southeast of the Porthos Range and extending for about 30 miles in a southwest-northeast direction. First visited in January 1957 by Australian National Antarctic Research Expeditions southern party led by W.G...

, Prince Charles Mountains

Prince Charles Mountains

Prince Charles Mountains is a major group of mountains in Mac. Robertson Land in Antarctica, including the Athos Range, the Porthos Range, and the Aramis Range. The highest peak is Mount Menzies . Other prominent peaks are Mount Izabelle and Mount Stinear...

. Plotted by Australian National Antarctic Research Expeditions (ANARE) from air photos taken by the RAAF Antarctic Flight in 1956. Named for Uwe Radok, lecturer in meteorology at the University of Melbourne

University of Melbourne

The University of Melbourne is a public university located in Melbourne, Victoria. Founded in 1853, it is the second oldest university in Australia and the oldest in Victoria...

, who greatly assisted Australian National Antarctic Research Expeditions (ANARE)'s glaciological program. Radok Lake is the deepest (362 m) known lake on the Antarctic continent and the only known freshwater

Freshwater

Fresh water is naturally occurring water on the Earth's surface in ice sheets, ice caps, glaciers, bogs, ponds, lakes, rivers and streams, and underground as groundwater in aquifers and underground streams. Fresh water is generally characterized by having low concentrations of dissolved salts and...

 lake to host a floating ice tongue glacier. Drained by 3 mi long Pagodroma Gorge

Pagodroma Gorge

Pagodroma Gorge is a steep-sided gorge 3 mi long which joins Radok and Beaver Lakes, in the Prince Charles Mountains. Photographed from Australian National Antarctic Research Expeditions aircraft in 1956. The gorge was traveled by A. Medvecky, Australian National Antarctic Research Expeditions ...

in to Beaver Lake.