Glaciers Deposits Features True or False? Give me more! 100 100 100 100 100 200 200 200 200 200 300 300 300 300 300 400 400 400 400 400 500 500 500 500 500

A glacier moves under this force

Gravity

A typical glacier moves more rapidly at this part

base

Glaciers move more rapidly when its warmer due to this process – give its name

Basal slip

Basal slip does not occur if the temperature is this

Too cold below freezing

In the middle of the glacier, the ice grains (firn) will move by slipping past one another through this process

Plastic flow

This is the general term for most unsorted and unstratified material left directly behind by a retreading glacier

Till

Tear or canoe shaped hill of unsorted/unstratified material left by a glacier

Drumlin

Drumlins direction of orientation is important for this reason

Drumlins are orientated in the direction of ice flow – the wide side of tear/highest end is located toward direction that ice flowed from and slopes down toward direction of initial ice movement

Rivers that form under the glacial ice can form this type of deposits

Eskers

Ice blocks that fall off of a retreating glacier may be covered by outwash, then be slow to melt, and eventually form a deep depression in the land that may or may not fill with water

Kettle (kettle lake)

Striations in bedrock provide an indication of glacier’s

Direction of ice flow

This is semi-circular feature is formed by an alpine glacier at the base/beginning of the glacier just below the moutain peak

Cirque

When two alpine cirques are found side by side, this steep high ridge feature is formed

Arete

In between two combining alpine glaciers, till may remain to form this feature

Medial moraine

Three features that are used to identify an esker

1. Steep sloped 2. Synuous ridge (continues for a long distance) 3 1. Steep sloped 2. Synuous ridge (continues for a long distance) 3. Undulating (the elevation of the esker can flucuate)

True or false - Rough granular ice material is called till

False – rough granular ice material is called firn

True or False: There is ice and rock material that is included into firn

False – firn only includes granular ice material and no rock

Valley glaciers have been found on every continent

False – Australia has had not valley glaciation

When a glacier melts back, then again moves not as far forward and stops for a period of time, a recessional moraine is formed

True

The theory of why the ice ages occurred in a cyclic pattern is called Milankovitch Theory

True

When three cirques are found on a mountain top, this very steep glacial peek may form

Horn

The 4 ice ages/advancements in the United States are named based on …

The state that shows the most advance/most prominent of the glacial features

The order of the ice ages in north america from oldest to youngest are

Nebraskan, Kansan, Illilioian, Wisconsinan

The furthest advance of a glacier will form this feature

End moraine OR Terminal moraine

On the far side of a terminal or recessional moraine, the meltwater will form a flat deposit of well sorted and stratified material called

Outwash or outwash plain