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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 | Early Cambrian | USSR(Baltic) | Yankauskas,T.V. Lower and Middle Cambrian acritarch-Based biozonation of the North western part of the East European Platform | 1993 | |
| details | Cambrian | Ordovician | Nd | Fensome,R.A. et al. Acritarchs and Fossil Prasinophytes: An index to genera, species and infraspecific taxa. | 1990 |