T h e l a s t G l a c i a l
E p o c h .
The last Great Glacier.
During
the latest growing of ice near a polar part of the Northern hemisphere of our planet the
huge Arctic ice cover was located. It was formed as a result of the union of the North
American and Eurasian ice covers in a uniform system.
The Arctic ice cover consists of a large ice shields, having the form as
flat-convex domes, which organized in some places the ice layers of 2 - 3 kilometers
height. The whole square of the ice cover was more than 40 millions sq. km. (for the
comparison: the square of the Northern America is 24 millions sq. km).
| The largest elements of the
Arctic ice cover are : 1 Lavrentiev shield with the center over a southwest part of the
Hudzon gulf;
2 Karskey shield with the center over the Karskoe sea was extended to all the north of
Russian flatness, Western and Average Siberia;
3 Greenland shield;
4 East Siberian shield, covering the Siberian seas, the coast of East Siberia and part
of the Chukotka;
5 Icelandic shield. |
The
map of the Arctic ice cover. |
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Even in severe Glacial Epoch
the climate was constantly changing. The glaciers gradually came on the south, and then
again stepped back. The ice cover has reached maximum power about 20 000 years ago.
At this time a maximum height of ice fields in some places reached 4 kms and
on the place of the cities St.-Petersburg, New York, Oslo, Murmansk and Montreal the
height was 1,5 kms.
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