0. Expansion of neighbouring cirques produces sharp arêtes, cols, and horns. outlet glacier A tongue of ice that extends radially from an ice dome. Cirques are concave, circular basins carved by the base of a glacier as it erodes the landscape. en.wiktionary.org. Definition of valley glacier. cirque glacier; cirque headwall; Cirque in English translation and definition "Cirque", Dictionary English-English online. 0. glaciated valley leading to a cirque. (Archaeology) archaeol an obsolete term for circle 11. Definition of a Glacier Webster- Definition: A large body of ice moving slowly down a slope or valley or spreading outward on a land surface. (October 18, 2020). Cirque, (French: “circle”), amphitheatre-shaped basin with precipitous walls, at the head of a glacial valley. Circ glaciar (sau căldare glaciară) este un termen din geologie și definește o depresiune circulară aflată în regiunile înalte ale munților, care a fost formată prin eroziune sau prin acțiunea unui ghețar. It is generally wide in relation to its length. Start studying Earth Science Chapter 7 Definition Flashcards Grade 7. A cirque may also be a similarly shaped landform arising from fluvial erosion. Cirques are formed by the erosive activity of glaciers and often contain a small lake. It generally results from erosion beneath the bergschrund of a glacier . As cirques are formed by glaciation in an alpine environment, the headwall and ridges between parallel glaciers called artes become more steep and defined. A glacial horn is the peak that forms from three arêtes. A bergschrund is a large crevasse that lies a short distance from the exposed rock walls and separates the stationary from the moving ice; in early summer it opens, exposing the rock at its base to diurnal changes of temperature. cirque glacier A relatively small body of ice, firn, and snow, occupying an armchair-shaped hollow in bedrock. During the Ice Age, ice covered 32 percent of land and 30 percent of the oceans. 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