| link
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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 | Middle Albian | Early Cenomanian | Nebraska | Pannella,G. Palynology of the Dakota Group and Graneros Shale of the Denver Basin. | 1966 |
| original | Early Cretaceous | Maryland | Brenner,G.J. The spores and pollen of the Potomac Group of Maryland | 1963 | |
| original | Albian | Maryland | Brenner,G.J. The spores and pollen of the Potomac Group of Maryland | 1962 |