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Paleogene

Subperiod of geologic time approximately 65 to 23 million years ago. https://doi.org/10.3133/fs20103059
Subtopics:
Oligocene (1 items)
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Geochronology and geology of late Oligocene through Miocene volcanism and mineralization in the western San Juan mountains, Colorado

New age determinations with descriptions of sample locations and analytical details.

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