external processes 2
Terms
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- glacier
- A glacier is a thick mass of land.
- valley glacier
- are small glaciers in mountain areas slowly following narrow stream valleys
- alpine glaciers
- are also small glaciers in mountain areas slowly following narrow steam valleys
- ice sheets
- are huge sheets that cover a continent
- till
- unlayered mixture of soils,gravel,rocks, and boulders
- why a glaciers moves
- Glacial movement is affected by weight,slope,type of surface, and general size
- erratic
- is a random boulders left behind by a glacier(not in piles)
- striations
- scratches/grooves on rocks created as glaciers drag sediments across the suface
- horn
- a sharp peak at the top of a mountain left after a glacier
- arete
- is a thin ridge exdending a horn sep. cique