boulder clay A glacial deposit that consists of boulders of varying size in a clay-dominated matrix, laid down beneath a valley glacier or ice sheet. Typically it is unstratified and unsorted, and characterized by rock types derived from the country crossed by the depositing glacier. Boulder clay is an older term for what is now more usually known as boulder till.
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valley glacier , valley glacier A long, relatively narrow ribbon of ice that is confined between valley walls. The Alpine type is fed by a series of cirque glaciers t… Till , Till Till is the general term for any sediments that were deposited solely by glacial ice . Till is distinguished from other glacial deposits formed… Glacial Landforms , Glacial landforms Glacial landforms are deposits of sediments produced by the advance and retreat of glaciers . As a glacier forms and advances, larg… Ice Cap , ice cap An ice mass that is less than 50 000 km2 in area, but is large enough to cover the underlying topography and whose flow behaviour is a conseq… Glaciology , CONCEPT Glaciology is the study of ice and its effects. Since ice can appear on or in the earth as well as in its seas and other bodies of water and… Scarp-and-vale Topography , scarp-and-vale topography A landscape consisting of a roughly parallel sequence of cuestas (scarps and dip slopes) and intervening valleys (‘vales’).…
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Boulding, Kenneth Ewart (1910 – 1993) English Economist, Social Scientist, Writer, and Peace Activist