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From
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Geolocation
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Author - title
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Year
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| details | Oligocene | Alaska | Trop,J.M. et al. Stratigraphy, palynology, and provenance of the Colorado Creek basin, Alaska, USA: Oligocene transpressional tectonics along the central Denali fault system. | 2004 | |
| details | Middle Eocene | Early Oligocene | Alabama | Frederiksen,N.O. Sporomorphs from the Jackson Group, (Upper Eocene) and adjacent strata of Mississippi and western Alabama. | 1980 |