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Chapter Sixteen Groundwater
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Types of Glaciers A large body of ice that flows downslope or spreads radially due to gravity. Glaciers cover ~ 10% of land surface today. Types of Glaciers- based on local topography Alpine – confined by surrounding bedrock highlands (small) Cirque- create and occupy semicircular basins on Mountain sides Valley- flow in valleys formally occupied by rivers Ice caps- found on Mountain tops Piedmont- found at foot of mountains Continental Ice Sheets- massive ice that covers much of a continent
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Climap
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Relationship between glaciers and latitude
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Formation of glacial ice from snow
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Elevation and slop steepness are two factors influencing glacier formation
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Types of glaciers
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Anatomy of a Glacier
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Mechanics of glacial flow
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Glacial abrasion and quarrying combine to shape a roche moutonnee.
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Deposition of glacial till
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Glacial advance and retreat and the deposition of moraines
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Geology at a Glance
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Medial moraines
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Geology at a glance
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Effect of the North American icesheets on the Greatlake glaciers
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The creation and draining of Glacial Lake Missoula
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Formation of terraces from crustal rebound
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Terraces rebound – contd.
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Formation of terraces from robound
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Features of periglacial environment
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Beringia detail
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Pollen concentration vs depth
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Coiling pattern vs climate
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Oxygen isotope composition
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Climate change during Quaternary
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Milankovitch’s theory
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Origin of North Atlantic deepwater
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Global climatic changes during Cenozoic
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Effect of the North American ice sheet
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Human activity contributes to global warming
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If all the ices were melt tomorrow – What happens??
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