Menzies, John Departments of Earth Sciences and Geography, Brock University, St. Catherines, Ontario, Canada.
Last reviewed:April 2020
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- Impact of glaciation
- Cause of global glaciation
- Distribution of glaciers and ice sheets
- Evidence of glaciation
- Pleistocene glaciations
- Pleistocene of North America
- The future
- Related Primary Literature
- Additional Reading
The history of glaciation on Earth, extending back in geological time to the Proterozoic and possibly the Archean. Global glaciations have occurred during every geological period except the Jurassic. This persistence of global glaciation, as well as repeated and continuing glaciation in high mountainous areas, wherever altitudes exceed the local snowline, is so consistent that one might argue that the Earth is essentially a glacial planet. Evidence suggests that glacial epochs have repeatedly occurred almost every 100,000 to 150,000 years. See also: Climate history; Geologic time scale; Glaciology
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