Transcript Glaciation powerpoint

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. 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.
Retreating glacier, Mt. Waddington
area, B.C.
Rock table, Palisade glacier, CA.
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-thanexpected rising sea
levels.
Images of
Melting
Glaciers
Videoclips

Melting Himalayan Glaciers
Video:http://video.google.ca/videosearch?q=Nature+Glaciated+
landscape&hl=en&emb=0&aq=f#q=melting+himalayan+glacier
s&hl=en&emb=0

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=J7ygfpuKm0&feature=player_embedded#
Climate Change Sees First
Refugees
http://www.thestar.com/news/world/article/699528