Distinguishing features: Stellate, multiradiate, rosette-shaped nannolith constructed from 10-15 single crystal-unit rays joined for most of their length along curved sutures; low birefringence under XPL.
Taxonomy:
Farinacci & Howe catalog pages: K. stellata *
Distinguishing features: Stellate, multiradiate, rosette-shaped nannolith constructed from 10-15 single crystal-unit rays joined for most of their length along curved sutures; low birefringence under XPL.
Morphology: Kokia borealis has fewer rays joined along straight sutures, and K. curvata has fewer rays that are overlapping.
Size: Diameter = 4.5-8.0 µm
Tags | LITHS: nannolith-radiate, circular, star-shaped, CA: closed, CROSS-POLARS: T-prominent, |
Metrics | Lith size: 4.5->8µm; Segments: 10->15; Data source notes: original description |
Geological Range:
Last occurrence (top): within Berriasian Stage (139.39-145.01Ma, top in Berriasian stage). Data source: Bown 2005
First occurrence (base): within Berriasian Stage (139.39-145.01Ma, base in Berriasian stage). Data source: Bown 2005
Plot of occurrence data:
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Kokia stellata compiled by Jeremy R. Young, Paul R. Bown, Jacqueline A. Lees viewed: 23-1-2021
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