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Timeline of glaciation. There have been five or six major ice ages in the history of Earth over the past 3 billion years. The Late Cenozoic Ice Age began 34 million years ago, its latest phase being the Quaternary glaciation, in progress since 2.58 million years ago. Within ice ages, there exist periods of more severe glacial conditions and ...
The timeline of glaciation covers ice ages specifically, which tend to have their own names for phases, often with different names used for different parts of the world. The names for earlier periods and events come from geology and paleontology.
During the 2.5 million years of the Pleistocene, numerous cold phases called glacials (Quaternary ice age), or significant advances of continental ice sheets, in Europe and North America, occurred at intervals of approximately 40,000 to 100,000 years.
There were two main glacial periods within the Cryogenian, each lasting for about 20 million years: the Sturtian at around 700 Ma and the Marinoan at 650 Ma. There is also evidence of some shorter glaciations both before and after these.
Pleistocene Epoch, earlier and major of the two epochs of the Quaternary Period of Earth’s history, an epoch during which a succession of glacial and interglacial climatic cycles occurred. It ended 11,700 years ago. It was preceded by the Pliocene Epoch and followed by the Holocene Epoch.
24 lis 2023 · There were two main glacial periods within the Cryogenian, the Sturtian from 720 to 660 Ma, and the Marinoan from 645 Ma to 635 Ma. The end of the Cryogenian glaciations coincides with the evolution of relatively large and complex life forms on Earth.
25 kwi 2017 · A glaciation period is marked by glacial and interglacial periods. Glacial periods occur when temperatures are at their lowest and glaciers extend far from the poles. Interglacial periods happen when the temperatures are milder, and the edges of glaciers move closer to the poles.