ES FINAL TEST 3 105

On a glacier, the marks the position between the zone of accumulation (permanent snow) and the zone of ablation (seasonal snow)

2. During a glacial period a glacier advances down a river valley. The river valley has a -shaped cross-section that will be modified into a -shaped cross-section by the erosive action of the glacier

ARETE

HORN

TARN

U-SHAPED VALLEY

CIRQUE

. Ice within a glacier flows by two mechanisms, basal slip and plastic flow. When ice flows by plastic flow it moves as a ___________ and dominates movement in __________ - based glaciers

A kettle lake (similar to those seen just south of the towns of Tully and Prebble on Highway 81) is:

A kame is

The landscape around Syracuse (and indeed, all of New York State) was largely formed by glaciation about 12,000 years ago due to the final advance (and retreat) of the Ice Sheet during the Wisconsinan Stage (this also formed Long Island and Martha’s Vineyard)

Eccentricity is one of the cycles that define the Milankovitch curves believed to control glacial cycles in the last 2 million years. Eccentricity is a 100,000 year orbital cycle and is due to

14. Precession is one of the cycles that define the Milankovitch curves believed to control glacial cycles in the last 2 million years. Precession is a 23,000 year orbital cycle and is due to

. True or false. Syracuse was covered by kilometers of ice during the last glacial maximum only 18,000 years ago

True or false. Younger layers of sediment always accumulate on top of older layer