Ice Age

(redirected from Glacial age)
Also found in: Dictionary, Thesaurus.

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.
..... Click the link for more information.
The Columbia Electronic Encyclopedia™ Copyright © 2013, Columbia University Press. Licensed from Columbia University Press. All rights reserved.
The following article is from The Great Soviet Encyclopedia (1979). It might be outdated or ideologically biased.

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.

The Great Soviet Encyclopedia, 3rd Edition (1970-1979). © 2010 The Gale Group, Inc. All rights reserved.

ice age

[′īs ‚āj]
A major interval of geologic time during which extensive ice sheets (continental glaciers) formed over many parts of the world.

Ice Age

[′īs ‚āj]
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.
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).
The ice began melting about 15,000 years ago, signaling the end of that glacial age. But after several thousand years of warming, the climate plunged back into ice-age conditions during a time known as the Younger Dryas period, which lasted between 13,000 years ago and 11,500 years ago.
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.
In trying to solve this problem, theorists have traditionally turned to the ice sheets -- those hallmarks of a glacial age tha once covered up to one-fourth the land surface of today's globe.
The forested mountains of the Adirondacks are, as she said, "not just a challenging pile of rocks, but are rock gardens, growing since glacial ages, and are to be treated with respect."
For example, there may have been some as-yet-unknown condition that made the rates of dissolution of calcium carbonate shells in glacial ages and now different.