[File:Estrela Março 2010-16b.jpg|thumb|right|240px|Cântaro Magro, Serra da Estrela, Portugal, formed as nunatak during the last ice age and now exposed]] A nunatak (from Inuit nunataq) is an exposed, often rocky element of a ridge, mountain, or peak not covered with ice or snow within (or at the edge of) an ice field or glacier. They are also called glacial islands.