GEOG 2051 Lecture : Geo Notes
Document Summary
This must be above the permanent snow line: antarctica is not a glacier, it"s a frozen ocean, look at movement under the glaciers. The ice under glaciers is blue: tunnels inside glaciers, glacial ice moves almost like water and the fastest movement is in the center, there is plastic flow in the ice. It picks up debris and put out on the snout: ablation zone-ice is lost form the glacier, velocities approaching 100m per day. Glacial budget: accumulation (alimentation, precipitation-snow, freezing rain on surface, condensation of vapor (sublimation, ablation (negative, melting, evaporation, calving-icebergs (73%, wind, avalanche. Types of glaciers: continental (during plesticine, greenland, antarctica, alpine mountain, glacial features, continental and alpine, erosional, depositional. Pleistocene: glacials, wisconsin most recent, about 61,000 years it lasted, illinoian, kansan, nebraskan, during glaciacians, sea level was high, sea level never got back to its original height after ice melted. Bottom of the oceans were going down: in the past we"ve had tremendous sea level change.
