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Lecture 17

The way of the wind is a strange, wild way. - Ingram Crockett Glacial deposition, and Wind . Lecture 17. Webpage for course (daytime). Webpage for course (nighttime). Why such interest in Glaciers?. Glaciers as erosion deposition process is very unusual

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Lecture 17

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  1. The way of the windis a strange, wild way. - Ingram CrockettGlacial deposition, and Wind Lecture 17 Webpage for course (daytime) Webpage for course (nighttime)

  2. Why such interest in Glaciers? Glaciers as erosion deposition process is very unusual Glaciers were important in fairly recent history Because we live in Maine

  3. Glaciers Can erode larger portions of mtns Transport and deposit the material Over 10,000s years Grains can be the size of trucks

  4. Glaciers Can erode larger portions of mtns Transport and deposit the material Over 10,000s years Grains can be the size of trucks

  5. In lowlands – deposition on large scale till Moraines Fig. 11-18

  6. Moraines terminal lateral medial recessional

  7. Special features unique to glacial deposition erratics kames eskers kettles drumlins

  8. erratics Fig. 11-19

  9. kame Fig. 11-23bl

  10. kettles Fig. 11-23br

  11. esker Fig. 11-23tl

  12. drumlin Fig. 11-23tr

  13. Mechanisms of Transportation and Deposition Water - streams, rivers, etc., freshwater and marine Wind Gravity – downslope movement Ice – glaciers Some sedimentary rocks form of atoms dissolved in water and precipitated elsewhere

  14. Some meteorology… Low pressure High Pressure

  15. deserts Frosted grains ventefacts Interesting features Fig. 12.14, p. 281

  16. Why is the desert floor covered with rocks? Fig. 12.12, p. 280

  17. Deflation Why is the desert floor covered with rocks?

  18. Fig. 12.13, p. 281

  19. Dust Bowl Fig. 12.15, p. 282

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