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When did the Silurian Period begin and end?
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Silurian Period
Distribution of landmasses, mountainous regions, shallow seas, and deep ocean basins during the middle part of the Silurian Period. Included in the paleogeographic reconstruction are the locations of the interval's subduction zones.
The Silurian Period began 443.8 million years ago and ended 419.2 million years ago.1
While some geochronologists have debated the precise timing and duration of the period due to the challenges of using absolute dates derived from radioactive isotopes, these figures represent the established timeline for the third period of the Paleozoic Era. The Silurian followed the Ordovician Period and preceded the Devonian Period.21