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Geolocation
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Author - title
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Year
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| details | Late Cambrian | Early Tremadocian | Canada(Newfoundland) | Parsons,M.G. et al. Acritarch microfloral succession from the Late Cambrian and Ordovician (Early Tremadoc) of Random Island, Eastern Newfoundland, and its comparison to coeval microfloras, particularly those of the Eastern European Platform. | 2000 |
| details | Late Cambrian | Early Ordovician | Algeria | Stricanne,L. et al. A statistical approach to classification of the Cambro-Ordovician galeate acritarch plexus | 2002 |