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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 | Late Llandoverian | Greenland | Aldridge,R.J. et al. Sphaerical Phosphatic microfossils from the Silurian of North Greenland. | 1981 | |
| details | Cenomanian | Arizona | Agasie,J.M. et al. Upper Cretaceous palynomorphs from the Dakota Sandstone of northeastern Arizona. | 1967 |