Taxonomy:
Distinguishing features: Large (>10 µm) beehive shaped sphenoliths
Farinacci & Howe catalog pages: S. grandis *
Search data:Tags | LITHS: nannolith-radiate, circular, cylindrical, CROSS-POLARS: R-prominent, |
Metrics | Lith size: 0->0µm; |
Geological Range:
Last occurrence (top): within NN8 zone (10.55-10.89Ma, top in Tortonian stage). Data source: approx range of unambiguous illustrated specimens
First occurrence (base): within NN6 zone (11.90-13.53Ma, base in Serravallian stage). Data source: approx range of unambiguous illustrated specimens
Plot of occurrence data:
Bergen, J. A., de Kaenel, E., Blair, S. A., Boesiger, T. M. & Browning, E. (2017). Oligocene-Pliocene taxonomy and stratigraphy of the genus Sphenolithus in the circum North Atlantic Basin: Gulf of Mexico and ODP Leg 154. Journal of Nannoplankton Research. 37(2-3): 77-112. gs V O Haq, B. U. & Berggren, W. A. (1978). Late Neogene calcareous plankton biochronology of the Rio Grande Rise (South Atlantic Ocean). Journal of Paleontology. 52: 1167-1194. gsReferences:
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Sphenolithus grandis compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 16-4-2021
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