Fact Attack Glacier Flashcards
(40 cards)
What was the time period for the Pleistocene?
2million - 11,500 years ago
How many years ago was the quaternary period?
2.6 million years ago
What are the 4 types of glacial environments?
Polar, Alpine, Glaciers, Periglacial
Average annual polar temp
-30 to -40
18,000 years ago was the last glacial maximum, what was its name?
Denvensian
Last UK glacial advance
Loch lomand stadial
When was the little ice age?
1550 -1750
Over how many years does eccentricity change?
100,000
Axial tilt varies by what degrees
21.8 - 24.4
Over how many years does the earth wobble
21,000
Average ice sheet size
10,000-100,000 sq I’m
Surging glaciers can flow up to how fast today?
100m per day
What percentage of all glaciers are in Antarctica
85%
Greenland contains how much of worlds ice
11%
Periglacial precipitation
600mm
How long does soil have to remain below 0° to be considered permafrost?
2 years
What percent of the earth experiences Periglacial conditions
20%
What percent of land does contain sporadic permafrost?
Less than 50%
What height can pingos reach
30 - 70 m
Names of both types of pingo
Open system and closed system
Ice wedge polygons found where?
Valley Floors
What % of Canada has permafrost?
Over 50%
What % of Alaska is covered by permafrost?
80%
Blockfields found where in Canada?
Northern Matinobia
