Glaciation CGC1D1 Glaciers have played an important role in the shaping of landscapes in the middle and high latitudes and in alpine environments. Their.

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Presentation transcript:

Glaciation CGC1D1 Glaciers have played an important role in the shaping of landscapes in the middle and high latitudes and in alpine environments. Their ability to erode soil and rock, transport sediment, and deposit sediment is extraordinary. During the last glacial period more than 50 million square kilometers of land surface were geomorphically influenced by the presence of glaciers.

This illustration shows how the plucking process is carried out This illustration shows how the plucking process is carried out. Notice how rocks are dislodged from the surface and dragged by the ice flow. This is one of the most important erosion process produced by a glacier This illustration renders a retreating glacier and its effects on the surrounding landscape. This illustration shows how a glacial landscape is created. Notice the glacier’s flows modifies the surrounded landscape.

During the Pleistocene epoch of the Quaternary Ice Age, glaciers (represented on map in white) covered much of the Earth’s northern hemisphere. Ice Ages consist of glacial periods and warmer interglacial periods

Mt. Rainer in Washington State Buchan Gulf, Baffin Island, seen from Baffin Bay. This huge marine embayment is the intersection of several major fjords which have been eroded into a 1,000 m high plateau by glaciers draining Baffin Island ice caps and continental ice sheets during the last 2-3 million years.

Ogives, Alaskan glacier. Medial moraines, AK.

Polar Glaciation in Greenland

Polar Glaciation in Greenland

Calving glacier, Johns Hopkins glacier, Glacier Bay, AK. Icefall, Nabesna glacier, AK.

Several retreating unnamed, small valley glaciers and several recently deglacierized cirques and ridges north of the terminus of Tonsina Glacier, northcentral Chugach Mountains, Alaska.

Rock table, Palisade glacier, CA. Retreating glacier, Mt. Waddington area, B.C. Rock table, Palisade glacier, CA.

Glacial groove in preCambrian Gowganda tillite, Ontario, Canada. Debris along a shear plane protecting ice from ablation, Breidamerkujokul, Iceland. Glacial groove in preCambrian Gowganda tillite, Ontario, Canada.

Glacially scoured bedrock, Findeln glacier, Switzerland. Debris cones, Breidamurkurjokull, Iceland.

A sharp rise in the volume of water produced by melting ice in Greenland has prompted scientists to warn of faster-than-expected rising sea levels.

Images of Melting Glaciers

Videoclips Melting Artic Glaciers Spell Disaster Video: http://www.youtube.com/watch?v=1Q53ikp947E Global Warming Creates World's First Climate Change Refugees Video: http://www.youtube.com/watch?v=NHtqe2nhXiM Google Earth Climate Introductory Tour Video: http://www.youtube.com/watch?v=J7ygf-puKm0&feature=player_embedded#

Climate Change Sees First Refugees http://www.thestar.com/news/world/article/699528