Exam 17: Glaciers and Glaciation

During the retreat of the last ice sheets, how long ago did modern sea level become established?

What happens to global sea level during ice ages and why?

The recessional moraine is the largest and outermost of many terminal moraines formed by a retreating glacier.

A(n)________ represents a former meltwater channel or tunnel on, in, or beneath glacial ice, that became filled with sand and gravel.

The upper 50 metres or so of a glacier is known as the zone of ________.

What does it mean when the terminus of a glacier has been stationary for several years?

Which present-day, Northern Hemisphere land mass or subcontinent contains evidence of the late Paleozoic, Southern Hemisphere glaciation of the supercontinent Pangaea?

The downstream end or terminus of a glacier advances over intervals of time during which ablation exceeds accumulation.

List the three mechanisms of glacial movement over its bed.

How do arêtes and horns form?

Examine the words and/or phrases for each question below and determine the relationship among the majority of words/phrases. -Choose the option that does not fit the pattern.

Glaciers can deform internally to behave like a plastic material and flow because ________.

Except for vestigial ice fields, Alpine glaciers are usually many times longer than they are wide.

Glaciers move so quickly that, on an annual basis, they are not very effective at removing any significant amount of water from the hydrologic cycle.

How do we know there was a Proterozoic glaciation in Ontario?

What was the most far reaching effect of the Ice Age on the world's oceans?

A(n)________ is similar in appearance to a sinkhole of a karst area.

Why is stratified drift composed mainly of coarse sand and gravel?

Briefly describe the three processes that lead to the formation of a glacier.

Because ice floats on seawater, coastal outlet and piedmont glaciers seldom erode much below the elevation of sea level at the times the glaciers are active.