The Last Ice Age (Leaving Cert Geography): Flashcards
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15 cards from this deck
% of Earth's land covered by glaciers today
% of Earth's land covered by glaciers today
10%
What are extended cold periods called?
What are extended cold periods called?
Ice ages
When the most recent ice age started
When the most recent ice age started
2.6 million years ago
When the most recent ice age ended
When the most recent ice age ended
10,000 years ago
Geological period from 2.6 million to 10,000 years ago
Geological period from 2.6 million to 10,000 years ago
Pleistocene
Areas covered by ice sheets during Pleistocene
Areas covered by ice sheets during Pleistocene
Greenland, Antarctica, N. Europe, N. America
Number of distinct glacial advance periods in Pleistocene
Number of distinct glacial advance periods in Pleistocene
At least 5
Scientist who proposed ice age theory
Scientist who proposed ice age theory
Louis Agassiz
Effect of ice sheet weight on Earth's crust
Effect of ice sheet weight on Earth's crust
Crust sinks, then rebounds when ice removed
Condition needed for glacier formation
Condition needed for glacier formation
Snow must accumulate faster than it melts
Compacted snow with 20-30% air, round ice grains
Compacted snow with 20-30% air, round ice grains
Firn
Air content % in fresh snow
Air content % in fresh snow
90%
Air content % in glacial/blue ice
Air content % in glacial/blue ice
20%
Type of climate period we currently live in
Type of climate period we currently live in
Interglacial period
Where ice sheets from last ice age remain today
Where ice sheets from last ice age remain today
Greenland, Antarctica, mountain regions (e.g., Alps)