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A nunatak (from Inuit nunataq) is the summit or ridge of a mountain that protrudes from an ice field or glacier that otherwise covers most of the mountain or ridge. They often form natural pyramidal peaks .
Boreas Nunatak (coordinates: 71°18′S 3°57′W) is a 220-metre-high (720 ft) nunatak, nearly 1 mile (1.6 km) southwest of Passat Nunatak at the mouth of Schytt Glacier in Queen Maud Land. It was discovered by the Third German Antarctic Expedition (1938–1939), led by Capt. Alfred Ritscher , and named after Boreas , one of the Dornier flying ...
A nunatak is a type of glacial refugium located on the snow-free, exposed peaks of mountains, which lie above the ice sheet during glaciations. [3] The identification of ‘diversity hotspots’ in areas that should have been migration regions during major glacial episodes is evidence for nunatak glacial refugia. [ 14 ]
The nunataks are for the most part tuyas [8] consisting of ridges with lengths of less than 1 to 6 kilometres (0.62 to 3.73 mi) flanked with scree deposits and occasionally by primary volcanic features. [9] According to Otto Nordenskjöld in 1901-1903, Christensen Nunatak features a crater. [5]
The fossiliferous horizons of the Ferrar Group at Carapace Nunatak contain one of the richest and most diverse freshwater Jurassic paleobiota known from Antarctica. Not only are these fossils diverse, except for poorly preserved petrified wood, the fossils found at Carapace Nunatak are remarkably well preserved to the extent that their source is referred to as a Lagerstätten.
A nunatak rising to about 1,500 metres (4,900 ft) high, 1.5 nautical miles (2.8 km; 1.7 mi) north-northeast of Schmutzler Nunatak in the southeast end of the Grossman Nunataks. Mapped by USGS from surveys and United States Navy aerial photographs, 1961-68, and Landsat imagery, 1973-74.
A small nunatak 1.5 nautical miles (2.8 km; 1.7 mi) southwest of Jurassic Nunatak in the west extremity of the Yee Nunataks. Named by US-ACAN in 1987 after the Triassic Period in geological time and in association with Jurassic Nunatak. The name does not imply the age of the rock constituting this feature. [3]
A somewhat isolated nunatak, situated 3 nautical miles (5.6 km; 3.5 mi) west-northwest of Doescher Nunatak and 15 nautical miles (28 km; 17 mi) north-northwest of Mount Weihaupt. Named by US-ACAN after Wilfred I. Doe, United States Navy, hospital corpsman with the McMurdo Station winter party, 1967.