https://gcmd.earthdata.nasa.gov/kms/concept/15256b96-f71f-43d2-8c1b-ab5dca5dd3db
broader |
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change note |
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definition | The Ludlow epoch (from 427.4 ± 0.5 million years ago to 423.0 ± 2.3 million years ago) occurred during the Silurian period, after the end of the Homerian age. | |||||||||||
narrower |
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reference |
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type |
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in scheme | chronounits original |