Ice Age

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Ice Age:

see Pleistocene epochPleistocene epoch
, 6th epoch of the Cenozoic era of geologic time (see Geologic Timescale, table). According to a classification that considered its deposits to have been formed by the biblical great flood, the epoch was originally called the Quaternary.
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Ice Age


a relatively long stage in the geological history of the earth during which, against the background of a general relative cooling of the climate, there was repeated alternation of very cold intervals of time (glacials), when extensive continental glaciation occurred, and intervals of time with a warmer climate (interglacials), when a significant part of the continental ice melted. Ice ages have been established in the Lower Proterozoic in North America; in the Upper Riphean in Africa and Australia; in the Wend in Europe, Asia, and North America; in the Ordovician of Africa; and at the end of the Carboniferous and the beginning of the Permian on the continent of Gondwana. The ice age of the Pleistocene has been studied most.

ice age

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A major interval of geologic time during which extensive ice sheets (continental glaciers) formed over many parts of the world.

Ice Age

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References in periodicals archive ?
Approximately 10,000 years ago during the last glacial age, a natural barrier at Bonnington Falls downstream of Kootenay Lake in Canada isolated white sturgeon (Acipenser transmontanus) in the Kootenai River drainage from other white sturgeon in the Columbia River basin (Northcote 1973).
In the 1990s many prominent meteorologists and scientists believed that we are now living in an inter glacial age (global warming) and that the next Ice Age will follow.
The ice began melting about 15,000 years ago, signaling the end of that glacial age.
Contrary to expectations, the scientists found that Antarctic diatoms fared poorly during the glacial age, they report in the May 16 NATURE.
After constructing a global map of vegetation at the peal of the glacial age, the researchers found that soils and land plants actually helped damp some of the carbon dioxide increase at the end of the last Ice Age.
As the sheet began to retreat near the end of the glacial age, the water broke through and flowed in torrents down to the Gulf of Mexico and Atlantic Ocean.