IMPACT ON ONTARIO Flashcards
What was the Ice movement like
Almost ‘alive’, moving and flowing
How did the ice erode the ground?
Moving against the ground was almost like sandpaper. Shaped the rocks into a bunch of different shapes
What happened to Rocks eroded by Glaciers?
Deposited as material beneath the glacier, GLACIAL TILL.
What happened to Sand and Gravel eroded?
Deposited as clay. Found in lake bottoms as glaciers melted and lakes formed
what were carved by glaciers?
Millions of depressions made by glaciers melting
What happened to areas carved?
Depressions would fill with water, GLACIAL LAKES
A famous example of glacial lakes are the _________
Great lakes
Land bouncing back
Isostatic Adjustment
Land bridge from Alaska to Siberia
Beringia
How heavy is a cubic metre of ice?
916 kg
How much was the depression at the thickest part of ice?
Half kilometer depression
How depressed was ontario?
280m depression in Ontario
What’s a good example of isostatic adjustment
Pillow bouncing back
The ancient sea in Hudson’s bay
Tuerell Sea
As the ice sheet melted, and before rebound sea water _________
flooded inward beyong present shoreline
What can be found in the clay blanket at Tyrell Sea
Fossilized marine animals
What happenes as the Tyrell Sea drained north?
New land emerged, arriving to present day Hudson’s bay and Jame’s bay
How long and how much adjustment is left?
10000 years left, another 100m to go.
