GL102 Lecture Notes - Lecture 7: Glacial Striation, Moraine, Ice Shelf
Document Summary
Glacier: thick ice, originate on land, accumulation, compaction and recrystallization of. Feb 28, 2017 snow: may form where precipitation falls at high elevation or high latitudes, glaciers are a powerful erosional force (give us landscape we have and can move. Ice can be stored for 1000s-10000s yr (or more) incredibly large chunks of rocks, perhaps not fast or quick but force is present) Ice sheets: continental ice sheets, currently: greenland atlantic. Valley (alpine) glacier: mountainous areas, usually following originally occupied by streams (may also create, advance slowly-few cm/yr, length is highly variable. Other types of glaciers (17. 2 figure, 17. 4 figure) Ice caps- smaller than continental glacier: outlet glaciers- flowing down valleys from large ice mass, piedmont glacier- oe or more alpine glacier emerge from a mountain valley -> broad. Ice stream- may extend from outlet glacier sheet. Spherical mass with a consistency of sand: firn: when thickness exceeds 50m, firn is fused into a solid mass.
