Geology 101 HW11

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Author:
pjay318
ID:
154213
Filename:
Geology 101 HW11
Updated:
2012-05-23 16:06:16
Tags:
glaciers Ice
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Description:
I FUCKING HATE GEOLOGY
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  1. Crevasse
    • a deep crack in an ice sheet or glacier
    • The resulting intensity of the shear stress causes a breakage along the faces.
  2. Ice Age
    a period of long-term reduction in the temperature of the Earth's surface and atmosphere, resulting in the presence or expansion of continental ice sheets, polar ice sheets and alpine glaciers
  3. Ice Shelf
    a thick floating platform of ice that forms where a glacier or ice sheet flows down to a coastline and onto the ocean surface.
  4. Interglacial
    a geological interval of warmer global average temperature lasting thousands of years that separates consecutive glacial periods within an ice age.
  5. Permafrost
    • Soil at or below the freezing point of water 0 °C (32 °F) for two or more years.
    • Most permafrost is located in high latitudes
    • (i.e. land close to the North and South poles)
  6. Glacial Till
    unsorted glacial sediment
  7. How do glaciers move?
    • Slowy - few feet/day
    • Surges - 100's of feet/day
    • -Pastic ductile flow
    • -Basal Slip
  8. Glacial Erosion
    • Plucking
    • Abrasion - creates flour and later deposited by wind as loess
    • Glacial Striations

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