Exam 13: Glaciers and Glaciation

Glacial till is:

What is the difference between ice caps and continental glaciers?

Any sediment deposited as a result of glacial activity is known as glacial ____________________.

The Pleistocene Ice Age ended:

Glaciers today cover about 10% of Earth's land surface.

Describe valley glaciers.

Why do continental glaciers generally flow more slowly than valley glaciers?

The three stages involved in the formation of a glacier are the precipitation of ____________________; the formation of ____________________ by partial thawing, refreezing, and crystallization; and compaction and recrystallization to produce ____________________ ____________________.

What is the budget of a glacier, and when is the budget considered balanced?

What are dropstones, and what do they indicate?

Finely laminated, alternating light and dark layers of sediment deposited in a glacial lake are known as glacial ____________________.

The process by which ice evaporates directly from the surface of a glacier is known as ____________________.

Like valley glaciers, continental glaciers produce sharp, angular landforms.

An ice mass of compacted and recrystallized snow that flows under its own weight on land is called a(n) ____________________.

When snow thaws and refreezes, which results in a loss of air and pore spaces, the result is ____________________.

The presence of ____________________ in the upper 40 m or so of a glacier indicates that this portion behaves not as a plastic but as a(n) ____________________ solid.

The terms glacier and permanent snowfield are synonymous.

Briefly explain the origin of drumlins.

Under what conditions will the firn limit remain the same from year to year? Under what conditions will it change? What happens if the firn limit moves upward year after year?

What are kettles, and how do they form?