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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 | Valanginian | Early Barremian | Romania | Antonescu,E. et al. Correlation dinoflagellates Iwith Ammonite and Calpionellid zones of the Lower Cretaceous of Svinita-Banat. | 1980 |
| original | Berriasian | Hauterivian | England(Yorkshire) | Duxbury,S. A palynostratigraphy of the Berriasian to Barremian of the Speeton Clay of Speeton, England. | 1977 |