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From
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To
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Geolocation
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Author - title
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Year
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| details | Miocene | Pacific Coast Offshore | Heusser,L.E. Data report: Initial results of pollen analyses from Sites 1018, 1020, 1021, and 1022. | 2000 | |
| details | Oligocene | Montana | Hamilton,W. et al. Volcanic rocks of Oligocene age in the southern part of the Madison Range, Montana and Idaho. (In: Geological Survey research 1962, Short Papers in geology, hydrology and topography. Articles 1-59) | 1962 | |
| details | Late Pliocene | California | Axelrod,D.I. et al. Late Pliocene floras East of the Sierra Nevada | 1960 |