In the history of the earth, there were periods when the continents were partly or largely covered by ice-sheets and glaciers. These periods are called the Ice Ages. These glaciers, the geologist believe, have sculptured much of the earth’s surface. They have covered roughly the northern half of North America. They gouged out lake beds and built hills.
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The present day ice sheets of Greenland and Antarctica are relics of the most recent ice age. This was one of the eight major ones during the past 700,000 years. It ended about 10,000 years ago.
During this last glaciation, ice sheets covered the northern part of Europe, Asia and North America.
There is strong evidence that periodic changes in the earth’s orbit around the sun caused ice ages.
Great changes affected the earth. Air and ocean temperature fell. Places that are deserts now were well watered and covered with plant life. Sea level fell over 100 meters.
According to experts the earth is now in one of its warm periods.
The present day ice sheets of Greenland and Antarctica are relics of the most recent ice age. This was one of the eight major ones during the past 700,000 years. It ended about 10,000 years ago.
During this last glaciation, ice sheets covered the northern part of Europe, Asia and North America.
There is strong evidence that periodic changes in the earth’s orbit around the sun caused ice ages.
Great changes affected the earth. Air and ocean temperature fell. Places that are deserts now were well watered and covered with plant life. Sea level fell over 100 meters.
According to experts the earth is now in one of its warm periods.
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