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Eocene dinoflagellates from the Coastal Belt of the Franciscan Complex, northern California
| Damassa, S.P. | |
| 1979a | |
| Journal of Palaeontology vol.53 pp.815-840 pl.1-8Journal of Palaeontology vol.53 pp.815-840 pl.1- | |
| Eocene dinoflagellates from the Coastal Belt of the Franciscan Complex, northern California |
Damassa, S.P., 1979; Eocene dinoflagellates from the Coastal Belt of the Franciscan Complex, northern California. Journal of Palaeontology vol.53 pp.815-840 pl.1-8 Isolated limestone blocks collected from the Coastal Belt of the Franciscan Complex in northern California have yielded excellently preserved dinoflagellates of early to middle Eocene age. Although rocks of the Coastal Belt long were thought to be of Cretaceous age, the vast majority of more than 100 samples examined from this 3000 km2 region of the California Coast Ranges indicates an early Tertiary-Eocene age. Several new tax are herein described from samples from the Willits-Ukiah area: Ochetodinium n. gen., O. romanum n. sp., Aireiana salictum n. sp., Danea impages n. sp., Hystrichokolpoma torquata n. sp., Impagidinium aspinatum (Cookson and Eisenack) n. stat., n. comb., I. californiense n. sp., Kisselovia stellata n. sp., and K. crassoramosa (Williams and Downie) n. stat. The 20 species here recorded comprise the first dinoflagellate assemblage of Eocene age to be reported from western North America.