Perotrilites variformis
- Citations total:
- 2
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| original | Maastrichtian | Paleocene | Montana | Oltz,D.F. Numerical analyses of palynological data from Cretaceous and Early Tertiary sediments in East Central Montana. | 1969 |
| details | Late Cretaceous | Paleocene | Montana | Oltz,D.F. Cluster analyses of Late Cretaceous-Early Tertiary pollen and spores | 1971 |