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Geolocation
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Author - title
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Year
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| original | Early Hauterivian | USSR | Bolkhovitina,N.A. Spore and pollen characteristics of Cretaceous layers in the Central Regions of the USSR. | 1953 | |
| details | Nd | Nd | Pocock,S.A.J. Microfloral analysis and age determination of strata at the Jurassic-Cretaceous boundary in the Western Canada Plains | 1962 |