Nunatak

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nunatak

[′nən·ə‚tak]
(geology)
An isolated hill, knob, ridge, or peak of bedrock projecting prominently above the surface of a glacier and completely surrounded by glacial ice.

Nunatak

 

(an Eskimo word), an isolated rocky peak that projects above the surface of a glacier where the ice cover is relatively thin. Nunataks are common along the rim of the ice caps of Greenland and Antarctica.

References in periodicals archive ?
PhytoCellTec Nunatak is an aqueous extract of these cells, according to Mibelle.
2006, Using cosmogenic isotopes to interpret the landscape record of glaciation: Nunataks in Newfoundland: in, Knight, P.
The new study by researchers at Arizona State University and the University of California, Santa Cruz, is based on analysis of just under 4g of powder extracted from a meteorite called Grave Nunataks 95229, discovered in 1995.
Yet almost the entire surface is occupied by large glaciers, and only the nunataks (rocky outcrops rising above the ice), some coastal areas (concentrated especially in the Antarctic Peninsula and the adjacent islands), and some extremely dry inland areas are free of ice and snow during the short Antarctic summer.
Interior thinning has led to the exposure of nunataks far from ice margins, and outlet glaciers have retreated substantial distances up-valley.
Although Finaeus is clearly depicting an ice-free continent, complete with a scatter of mountain ranges and rivers flowing from them to the sea, Weihaupt maintains that it is shown as being wholly or largely covered by an ice sheet with, presumably, the mountains protruding as nunataks.
In favour of first arrival from the west to the Swedish Scandes is the rapidity with which spruce, according to the megafossil record, appears in the early Holocene, for example, on late-glacial nunataks in the Scandes (Kullman, 2000; Paus et al.
John made a welcome visit to the glacier camp to help with the work there, and roamed the scree slopes and nearby nunataks, identifying 35 plants in what looks like a barren wilderness.
The base camp for the inland party was situated so that mountain ridges and nunataks could be reached via several north-flowing outlet glaciers.
Nunataks (knobs of bedrock poking through the i1cefields) reportedly provided navigational guides, as we hear below.
Small breeding groups may also occur on some of the many nunataks emerging from the glaciers and snow fields inland on Bylot Island, but none has yet been found.