-
How many major continental ice sheets were there in the ice age? Where were they?
There were four. They were located in Greenland, Antartica, North America, and Northern Europe.
-
Which ice caps still remain?
Greenland's and Antartica's.
-
How far did the North American ice sheet extend? What did the North American ice sheet create?
It extended to New York, and created the Great Lakes.
-
In what direction do ice plates move?
Downward
-
Manhattan exists due to ______ activity.
Glacial
-
There were _____ major glacial advances during the ice age. There were also glacial _____. Ice age was a period of __________.
Four. Retreats. Oscillation.
-
What are the reasons for climate change?
Axial tilt, rotational wobble (Milankovitch cycles), and volcanic eruptions.
-
What is an alpine/ mountain valley glacier?
A glacier that starts out appearing only seasonally. After some time, some of the snow that doesn't melt begins to accumulate past the normal seasons.
-
Define firn.
Compact ice and snow.
-
Define cirque. How are they created?
Cirques are bow-shaped depressions. They are created as gravity pulls on the ice, which tugs on the rock.
-
What is a glacial horn?
A pyramidal peak that results when several cirque glaciers gourge an individual summit from all sides.
-
What is an arete?
A sawtooth ridge that has been carved by glacier on two sides.
-
What is a fjord? How is it created?
long, narrow, deep inlet of the sea between high cliffs. They are typically formed by submergence of a glaciated valley.
-
What is a zone of accumulation?
The zone where ice and snow build up over time.
-
What is a zone of ablation?
Zone where ice and snow melts.
-
Define till.
Material that a glacier is carrying ( boulders, sand, pebbles)
-
What is morraine?
Glacial till deposits.
-
Define esker.
A sinuously carving, narrow ridge of coarse sand and gravel.
-
What is an outwash plain?
The area of stratified drift beyond morrainal deposits that features channels that are meltwater-fed, braided, and overloaded with sorted and deposited materials.
-
What is kettle? How is it formed?
A steep-sided hole that frequently fills with water. It forms when an isolated block of ice remains in a ground morraine , outwash plain, or valley floor, accumulates material around it as it melts.
-
What is loess? How does it form?
Glacial silt. It was carved and ground up by glaciers, washed away and then deposited in layers.
-
Define lateral morraine.
A deposition of glacial sediment that forms along the side of a glacier.
-
Define terminal morraine.
Eroded debris that is dropped at the glacier's furthest extent.
-
What can cause small glaciers to combine into a large glaicer?
Small glacial tributaries.
-
What is an erratic rock?
Rocks deposited erratically by a passing glacier.
-
How far did glaciers get in North America?
As far as the Sierra Nevada mountains.
|
|