https://gcmd.earthdata.nasa.gov/kms/concept/a58844b9-65e5-4b5a-98ab-b99968769d4a
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definition | The Floian is the second stage of the Ordovician geologic period. It succeeds the Tremadocian with which it forms the Lower Ordovician epoch. It precedes the Dapingian stage of the Middle Ordovician. The Floian extended from 477.7 to 470 million years ago. | |||||||||
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in scheme | chronounits original |