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ice age

Translation
ice age
(often caps.) the glacial epoch, esp. the Pleistocene Epoch.
[1870-75]

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or glacial age

Any geologic period during which thick ice sheets cover vast areas of land.

Such periods of large-scale glaciation may last several million years and drastically reshape surface features of entire continents. A number of major ice ages have occurred throughout the Earth's history; the most recent periods were during the Pleistocene Epoch (1.8 million–10,000 years ago).

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also called  glacial age 
 any geologic period during which thick ice sheets cover vast areas of land. Such periods of large-scale glaciation may last several million years and drastically reshape surface features of entire continents. A number of major ice ages have occurred throughout Earth history. The earliest known took place during Precambrian time dating back more than 570 million years. The most recent periods of widespread glaciation occurred during the Pleistocene Epoch (1.8 million to 11,500 years ago).

  A lesser, recent glacial stage called the Little Ice Age began in the 16th century and advanced and receded intermittently over three centuries in Europe and many other regions. Its maximum development was reached about 1750, at which time glaciers were more widespread on Earth than at any time since the last major ice age ended about 11,500 years ago.
 

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Universalium. 2010.

  
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