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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 | Cambrian | Ordovician | USSR(Baltic) | Timofeev,B.V. Paleological investigation of petroleum. | 1965 |
| details | Early Eocene | England | Davies,E.H. et al. The application of dinoflagellates to paleoenvironmental problems. | 1982 | |
| original | Senonian | France(Paris Basin) | Deflandre,G. Microfossils from Cretaceous Flints.Second Part | 1937 |