Operculites
- Citations total:
- 3
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| details | Maastrichtian | Canada(Alberta) | Srivastava,S.K. Genus Sigmopollis from the Maestrichtian Scollard Formation, Alberta, (Canada), and its algal affinity. | 1984 | |
| details | Oligocene | Early Miocene | Washington | Newman,K.R. Palynology of interflow sediments from the Standard Oil Company of Caltfornia Rattlesnake Hills No.1 Well, Benton County, Washington. | 1969 |
| original | Campanian | Maastrichtian | Colorado | Newman,K.R. Upper Cretaceous-Paleocene guide palynomorphs from Northwestern Colorado. | 1965 |