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Nigrini, Catherine A; Sanfilippo, Annika (2000): Range charts of stratigraphically important radiolarian species in sediments of ODP Leg 165 sites [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.803255, Supplement to: Nigrini, CA; Sanfilippo, A (2000): Paleogene radiolarians from Sites 998, 999, and 1001 in the Caribbean. In: Leckie, RM; Sigurdsson, H; Acton, GD; Draper, G (eds.) Proceedings of the Ocean Drilling Program, Scientific Results, College Station, TX (Ocean Drilling Program), 165, 1-25, https://doi.org/10.2973/odp.proc.sr.165.026.2000

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Abstract:
The Paleogene sequences from three sites in the Caribbean were examined for radiolarians. In general, samples are highly lithified, requiring lengthy and repetitive cleaning procedures, and the assemblages are usually fragmented and/or partially dissolved. Both abundances and preservation of the assemblages vary considerably from site to site and within a single site; even within a single sample more than one degree of preservation was observed. It was possible, however, to construct at least partial stratigraphies for each of the three sites. Because the abundance of radiolarians is high even in extremely poorly preserved assemblages, we conclude that the differences in biogenic silica preservation are the result of postdepositional processes and not productivity.
In both Sites 999 and 1001, near the Paleocene/Eocene boundary (Bekoma bidartensis Zone [RP7]), there is a short interval in which the abundance and preservation state of the radiolarians improves relative to overlying and underlying assemblages. In each case the intervals corresponds to the level, identified by calcareous microfossils, as representing changes in paleoceanographic conditions associated with the late Paleocene thermal maximum.
Project(s):
Ocean Drilling Program (ODP)
Coverage:
Median Latitude: 16.869900 * Median Longitude: -79.880750 * South-bound Latitude: 12.743300 * West-bound Longitude: -82.936100 * North-bound Latitude: 19.489600 * East-bound Longitude: -74.910500
Date/Time Start: 1995-12-28T21:15:00 * Date/Time End: 1996-02-12T19:30:00
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
4 datasets

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Datasets listed in this publication series

  1. Nigrini, CA; Sanfilippo, A (2000): (Table 1) Range chart for stratigraphically important radiolarian species in ODP Hole 165-998A sediments. https://doi.org/10.1594/PANGAEA.315747
  2. Nigrini, CA; Sanfilippo, A (2000): (Table 2) Range chart for stratigraphically important radiolarian species in ODP Hole 165-998B sediments. https://doi.org/10.1594/PANGAEA.315748
  3. Nigrini, CA; Sanfilippo, A (2000): (Table 3) Range chart for stratigraphically important radiolarian species in ODP Hole 165-999B sediments. https://doi.org/10.1594/PANGAEA.315749
  4. Nigrini, CA; Sanfilippo, A (2000): (Table 4) Range chart for stratigraphically important radiolarian species in ODP Hole 165-1001A sediments. https://doi.org/10.1594/PANGAEA.315746