GEG 120 Study Guide - Midterm Guide: Ice Shelf, Leading Edge, Great Salt Lake
14 May 2013
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Document Summary
Accompanying rise and fall of global sea levels. Cryosphere: all forms of frozen water in the vicinity n earth"s surface. Our focus is on glaciers as powerful agents of landscape transformation. Glacier: body of ice, formed on land that is in motion (they do not move but very slowly and not easy to observe) Geographic hallmarks of earths periodic ice ages altitudes everywhere. Interglacial period of warmer worldwide temps between the last deglaciation and the onset of the next glaciation. Many questions about periodicity and terrestrial vs. solar-system conditions - but no scientific consensus. Glaciation- cooler period of ice expansion (continental and alpine) Lowered global temperatures trigger expansion of glacial expansion in higher latitudes and high. When mass balance (gains vs. losses) is positive, glacier thickness and advances, and its leading. When negative, glacier thins and recedes and front end is less distinct and marked by gray.
