nunatak
Sign in to savethumb|Nunataks in Antarctica thumb|Cântaro Magro, Serra da Estrela, [[Portugal, formed as a nunatak during the last ice age and now exposed.]] A nunatak (from Inuit ) 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. Isolated nunataks are also called glacial islands, and smaller nunataks rounded by glacial action may be referred to as rognons.
AI overview
A nunatak is a mountain peak or ridge that sticks up through a glacier or ice field, like an island surrounded by ice. These features are important for understanding past ice ages and present-day glacial landscapes, as they show where glaciers have covered mountains and help scientists study how ice sheets have changed over time.
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thumb|Nunataks in Antarctica thumb|Cântaro Magro, Serra da Estrela, [[Portugal, formed as a nunatak during the last ice age and now exposed.]] A nunatak (from Inuit ) 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. Isolated nunataks are also called glacial islands, and smaller nunataks rounded by glacial action may be referred to as rognons.
The word is of Greenlandic origin and has been used in English since the 1870s.