Chapter Sixteen Groundwater

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Presentation transcript:

Chapter Sixteen Groundwater

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

Climap

Relationship between glaciers and latitude

Formation of glacial ice from snow

Elevation and slop steepness are two factors influencing glacier formation

Types of glaciers

Anatomy of a Glacier

Mechanics of glacial flow

Glacial abrasion and quarrying combine to shape a roche moutonnee.

Deposition of glacial till

Glacial advance and retreat and the deposition of moraines

Geology at a Glance

Medial moraines

Geology at a glance

Effect of the North American icesheets on the Greatlake glaciers

The creation and draining of Glacial Lake Missoula

Formation of terraces from crustal rebound

Terraces rebound – contd.

Formation of terraces from robound

Features of periglacial environment

Beringia detail

Pollen concentration vs depth

Coiling pattern vs climate

Oxygen isotope composition

Climate change during Quaternary

Milankovitch’s theory

Origin of North Atlantic deepwater

Global climatic changes during Cenozoic

Effect of the North American ice sheet

Human activity contributes to global warming

If all the ices were melt tomorrow – What happens??