1. Ice in glaciers is recrystallized snow.
2. Glaciers require a cool climate with adequate precipitation in order to form.
3. Ice is both a mineral and a monomineralic metamorphic rock.
4. Ice has low elastic limit.
5. Flowing ice is stratified.
6. Many process occur simultaneously in flowing ice.
7. There are two processes that cause of flow in glaciers: gravity, extrusion.
8. There is a threshold thickness required for ice to flow.
9. The surface of ice is brittle; plastic flow occurs in lower portion of ice.
10. The ice in glaciers flows at different rates.
11. Ice can heal itself by refreezing.
12. Local obstructions cause shear planes in flowing ice.
13. The erosional, transportational, and depositional processes in glaciers include: corasion, plucking, traction, suspended load, top load, erratics.
14. There is minimal water interchange between glaciers and groundwater.
15. A glacial valley has huge U-shaped cross section.
16. Glacier deposits: a. don't reflect velocity or gradient, b. only minimal dissolved load, c. three types of ice deposition: material falls off of ice, material dropped out of melting ice, material pushed along in front of ice.
17. Ice is highly reflective.
18. Icebergs are blocks of ice floating in water.
19. Most of global ice is in the polar caps.
20. There are 4 categories of ice accumulations: Valley or Alpine glaciers, Piedmont glacier, Continental ice sheets, Ice Caps.
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Virtual Field Trip in Glacier National Park. http://www.nps.gov/glac/eHikes.htm
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