Relative abundance, preservation, and distribution of calcareous nannofossils from ODP Hole 101-628A (Table 1), supplement to: Moran, Michael J; Watkins, David K (1988): Oligocene calcareous-nannofossil biostratigraphy from Leg 101, Site 628, Little Bahama Bank Slope. In: Austin, JA Jr.; Schlager, W; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 101, 87-103

Michael J Moran & David K Watkins
Drilling at Hole 628A, Leg 101 of the Ocean Drilling Program, recovered a thick, relatively complete Oligocene section of nannofossil-foraminifer chalk and ooze. Sediments from Cores 101-628A-16H through 101-628A-29X were examined using the light microscope to provide information about biostratigraphy of calcareous nannofossils. Several authors noted a problem in distinguishing the first appearance of species within the Sphenolithus predistentus-S. ciperoensis lineage of the mid-Oligocene, particularly Sphenolithus ciperoensis, because of the gradual evolution of its members....
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