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Fenner, Juliane M (1991): Diatoms in Paleocene sediments of the southwestern South Atlantic [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.755367, Supplement to: Fenner, JM (1991): Taxonomy, stratigraphy, and paleoceanographic implications of Paleocene diatoms. In: Ciesielski, PF; Kristoffersen, Y; et al. (eds.), Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 114, 123-154, https://doi.org/10.2973/odp.proc.sr.114.137.1991

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Published: 1991 (exact date unknown) • DOI registered: 2011-01-14

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Abstract:
The taxonomy and stratigraphy of pelagic Paleocene diatoms from ODP Sites 698, 700, and 702 and DSDP Site 524 in the South Atlantic and DSDP Site 214 in the Indian Ocean are presented, as well as paleogeographic and paleoecologic implications. Eleven new species and one new variety are described and one new combination is proposed:
Coscinodiscus cruxii sp. nov.
Grunowiella palaeocaenica var. alternans var. nov.
Hemiaulusl beatus sp. nov.
Hemiaulusl ciesielskii sp. nov.
Hemiaulusl conicus sp. nov.
Hemiaulus kristoffersenii sp. nov.
Hemiaulus nocchiae sp. nov.
Hemiaulusl oonkii sp. nov.
Hemiaulusl velatus sp. nov.
Triceratium gombosii sp. nov.
Trochosira gracillima comb. nov.
Trochosira marginata sp. nov.
Trochosira radiata sp. nov.
Hole 700B provides one of the most continuous diatomaceous Paleocene profiles known. Stratigraphic ranges of diatom species from this and other Southern Hemisphere sites are calibrated against calcareous microfossil zones. The first-appearance datums of Triceratium gombosii, Hemiaulus incurvus, and Triceratium mirabile in Paleocene deep-sea sediments are useful for regional stratigraphic correlations.
Quantitative analysis of the biosiliceous microfossil groups (diatoms, silicoflagellates, radiolarians, and archaeomonadaceae) shows that preservation of diatoms is confined primarily to the upper Paleocene (planktonic foraminifer Zones P3 and P4 and calcareous nannofossil Zones upper NP5 to lower NP9). In the lower Paleocene only short intervals in Hole 700B are diatomaceous. A correlation between the degree of silica diagenesis and the calcium carbonate content of the sediment is not obvious.
Diatom species analysis reflects changes in the paleoenvironment between island-related upwelling conditions with highly diverse and well-preserved diatom assemblages and less productive periods resulting in less wellpreserved diatom assemblages with a higher content of robust neritic diatoms.
Project(s):
Deep Sea Drilling Project (DSDP)
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: -45.115207 * Median Longitude: -12.223533 * South-bound Latitude: -51.533000 * West-bound Longitude: -33.099300 * North-bound Latitude: -11.336800 * East-bound Longitude: 88.718000
Date/Time Start: 1972-02-08T00:00:00 * Date/Time End: 1987-04-15T22:59:00
Event(s):
22-214 * Latitude: -11.336800 * Longitude: 88.718000 * Date/Time: 1972-02-08T00:00:00 * Elevation: -1655.0 m * Penetration: 500 m * Recovery: 340.9 m * Location: Indian Ocean//RIDGE * Campaign: Leg22 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 53 cores; 492.5 m cored; 2.5 m drilled; 69.2 % recovery
73-524A * Latitude: -29.484200 * Longitude: 3.512300 * Date/Time: 1980-05-21T00:00:00 * Elevation: -4796.0 m * Penetration: 47.5 m * Recovery: 9.9 m * Location: South Atlantic/CANYON * Campaign: Leg73 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 2 cores; 19 m cored; 0 m drilled; 51.9 % recovery
114-698A * Latitude: -51.459000 * Longitude: -33.099300 * Date/Time Start: 1987-03-16T13:05:00 * Date/Time End: 1987-03-19T21:29:00 * Elevation: -2138.0 m * Penetration: 237 m * Recovery: 52.26 m * Location: South Atlantic Ocean * Campaign: Leg114 * Basis: Joides Resolution * Method/Device: Drilling/drill rig (DRILL) * Comment: 27 cores; 237 m cored; 0 m drilled; 22.1 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
3 datasets

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Datasets listed in this publication series

  1. Fenner, JM (1991): (Table 3) Occurrence of diatom species in the Paleocene of ODP Hole 114-700B, Part I. https://doi.org/10.1594/PANGAEA.755365
  2. Fenner, JM (1991): (Table 3) Occurrence of diatom species in the Paleocene of ODP Hole 114-700B, Part II. https://doi.org/10.1594/PANGAEA.755366
  3. Fenner, JM (1991): (Table 2) Occurrence of diatom species in the Paleocene of the southwest Atlantic. https://doi.org/10.1594/PANGAEA.755364