https://gcmd.earthdata.nasa.gov/kms/concept/8ec111c5-b689-4482-9bfe-a9884c44f7f3
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definition | The Lochkovian is one of three faunal stages in the Early Devonian epoch. It lasted from 419.2 ± 3.2 million years ago to 410.8 ± 2.8 million years ago. It marked the beginning of the Devonian Period, and was followed by the Pragian stage. | |||||||||
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in scheme | chronounits original |