Exam 17: Glaciers and Glaciation

A(n)________ is a depositional feature composed primarily of till and usually associated with continental glaciation.

Arêtes, horns, and U-shaped valleys are erosional features carved from bedrock by valley glaciers.

Glacial ice is very effective as an agent of erosion.How would you identify glacial sediments from alluvial (stream)sediments? Also, could certain glacial sediments be mistaken for alluvium?

Upon what evidence did Agassiz base his ice age theory?

Other than massive erosional and depositional work, name three indirect effects of the glacial cycles of the last Ice Age.

Glacial Lake Agassiz was dammed to the east by the ________ ice sheet and for most of its history drained southwards through the ________ River.

What physical property of H₂O allows glaciers to flow, particularly by basal slip?

Who was the first scientist to hypothesize and promote the idea of a great Pleistocene Ice Age with extensive and far reaching effects?

Which of the following glacial features would typically be found in close proximity?

When glaciers suddenly speed up and move at up to 100 times their normal rate, this is called a ________.

Which of the following is often associated with a cirque basin in high, mountainous terrain?

What two different types of locations are capable of forming glaciers?

________ are both deposited by meltwater streams.

A(n)________ is likely to host a large stream with a waterfall or steep rapids today.

What was the first Canadian diamond mine to be developed in the Northwest Territories?

Because ice carries both large and small particles, and cannot sort sediments, we recognize that till is a poorly sorted sediment deposited directly from the melting glacial ice; stream action is minimal.

Most of Canada was covered by one or more of the large continental Pleistocene ice sheets, especially the Laurentide in the east and the Cordilleran in the west.

What landform accumulates as a ridge of till at the snout or down-valley edge of a glacier?

Which one of the following is not normally a feature of glaciated, alpine terrains?

How do roches moutonnées and drumlins differ?