Timeline of glaciation
Chronology of the major ice ages of the Earth
Timeline of glaciation
The earth has been free of permanent ice sheets for most of its history, and there have been nine glacial periods over the past 3 billion years. The earth is now in the Late Cenozoic Ice Age, which began around 33.9 million years ago, when ice began to build up in the Antarctic. Its latest phase is the Quaternary glaciation, which started around 2.58 million years ago and is still ongoing. Within ice ages, there exist periods of more severe glacial conditions and more temperate conditions, referred to as glacial periods and interglacial periods, respectively. Earth is currently in such an interglacial period of the Quaternary glaciation, with the Last Glacial Period of the Quaternary having ended around 11,700 years ago. The current interglacial is known as the Holocene epoch. Based on climate proxies, paleoclimatologists study the different climate states originating from glaciation.
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