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Flashcards in Cold Environment Keywords Deck (10)
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1

What does fluvioglacial (glacifluvial) mean?

Processes and land forms that are associated with the action of glacial meltwater.

2

What is a glacier?

A tongue-shaped mass of ice slowly moving down a valley.

3

What were the ice ages?

Major cold phases (ice sheets covering large areas of the world).
Last ice age from 2 million years ago to 10,000 BP.

4

What is an ice sheet?

A body of ice covering an area of at least 50,000km2.
Dome-shaped.
Ice flows outward from the centre.
Major ice sheets are Antarctica and Greenland.
Smaller ice sheets cover Iceland and Norway.
Major ice sheets can be 2,000m thick.

5

What does periglacial mean?

Processes and landforms associated with the fringe of, or the area near to, an ice sheet or glacier.

6

What is a tundra?

Northernly - Eurasia and North America.
A vast, flat, treeless Arctic region in which the subsoil is permafrost.

7

What is permafrost?

Permanently frozen soil.
Two consecutive years.

8

What does interglacial periods mean?

Times when temperatures are warmer for extended periods.
Marked by the retreat of ice to higher altitudes or Latitudes.

9

What does glacial periods mean?

Times when the temperature has dropped significantly.
Marked by advances of the World's ice masses to lower latitudes and lower altitudes

10

What is a glacier snout?

The lowest end of a glacier.