Exam 18: Glaciers and Glaciation

What evidence of glacial erosion is visible in this image?

Which of the following descriptions does not specifically apply to sediments carried away from the glacier by meltwater streams?

Outwash sediments are stratified by wind deposition.

Which crevasse will form parallel to the terminus as a glacier moves over a change in slope?

When a glacier is in retreat, the ice can flow from the Zone of Ablation to the Zone of Accumulation.

When was the Last Glacial Maximum?

Which continent had the greatest area covered by glaciers at the height of the Ice Age?

Ice shelves are grounded in ________ and float in ________.

The amount of solar radiation coming in at ________ helps to determine whether or not a planet is going into an Ice Age.

There have been several instances in the last 150 years when valuable materials such as diamonds have been found contained in glacial debris.If one wanted to try to trace such valuable materials back to their source, which moraine would be most useful for tracing valuable gold deposits back to their bedrock source area?

A kame is an ice-contact deposit.

A ________ is a small, circular lake that occupies a cirque basin.

How does the formation of a hanging valley differ from the formation of the main glacial trough?

Glacial Lake Agassiz went through many periods of catastrophic drainage starting at 13,000 years ago.Some of these periods of catastrophic change have been linked to periods of cooling climate, particularly when the lake drained through the St.Lawrence Seaway and into the North Atlantic.How would the drainage of Lake Agassiz affect the climate to such a degree that cooling would result?

Glaciers form in areas where more snow falls in the winter than is lost in the summer.

How does a glacial fjord form? What does it tell us about climate change after glaciation?

Because sea level does not act like base level with glaciers, a glacier can erode its bed below sea level.

A(n)________ is a sharp, knife-edged ridge that forms between two valley glaciers.

________ is the name for glacial deposits that have been lithified into a sedimentary rock.

During the Wisconsin Episode Glaciation, a glacial forebulge formed just off the coast of British Columbia in the vicinity of Queen Charlotte Island.What is a glacial forebulge and how did this one form?