Watkins, David K; Wise, Sherwood W; Villa, Giuliana (2001): (Table 1) Range chart of calcareous nannofossils in samples of sediment core CRP-3 [dataset]. PANGAEA, https://doi.org/10.1594/PANGAEA.484682, Supplement to: Watkins, DK et al. (2001): Calcareous nannofossils from Cape Roberts Project drillhole CRP-3 Victoria Land Basin, Antarctica. Terra Antartica, 8(4), 339-346, hdl:10013/epic.28238.d001
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Published: 2001 (exact date unknown) • DOI registered: 2006-08-14
Abstract:
Fossil specimens of the exclusively oceanic calcareous nannoplankton were found only in the upper 200 m of the Cape Roberts Project 3 (CRP-3) cores. These assemblages are depauperate and sporadic in occurrence. The majority of the assemblages contain fewer than 4 species, indicating a severe palaeoecological restriction. The clear domination of these assemblages by reticulofenestrid species, coupled with the almost total exclusion of Coccolithus pelagicus, indicates cold surface water conditions in the Victoria Land Basin during the lives of these poor algae. These cold surface water conditions, perhaps coupled with abnormal surface water chemistry, excluded almost all of the age-diagnostic species from the area. The occurrence of Transversopontis pulcheroides, however, suggests a biostratigraphic assignment of lower Oligocene for this part of the core. The CRP-3 assemblages occur within fine-grained clastic sedimentary rocks, but only those that are in close stratigraphical proximity with coarser-grained lithologies.
Project(s):
Cape Roberts Project (CRP)
Coverage:
Latitude: -77.006000 * Longitude: 163.719000
Date/Time Start: 1999-10-09T00:00:00 * Date/Time End: 1999-11-19T00:00:00
Minimum DEPTH, sediment/rock: 2.85 m * Maximum DEPTH, sediment/rock: 278.54 m
Event(s):
CRP-3 * Latitude: -77.006000 * Longitude: 163.719000 * Date/Time Start: 1999-10-09T00:00:00 * Date/Time End: 1999-11-19T00:00:00 * Elevation: -295.0 m * Penetration: 939 m * Recovery: 936 m * Location: Ross Sea * Campaign: CRP-3 * Basis: Sampling/drilling from ice * Method/Device: Core wireline system (CWS) * Comment: 11.76 km at 76° true from Cape Roberts, 2.04 km at 225° true from CRP-2. Fast ice thickness: 2.0 to 2.2 m. Sea rise embedded to 9.55 mbsf. Lateral ice movement from spudding 5.0 m to 82° true. HQ core to 345.85 mbsf. NQ core to 939.42 mbsf. Core recovery 97%. Phase 1 logging to 345 mbsf, Phase 2 logging to 773 mbsf, Phase 3 logging to 918 mbsf. Deepest Cenozoic lithology and depth: sandstone breccia from 822.87 to 823.11 mbsf. Age of oldest Cenozoic strata: earliest Oligocene or latest Eocene. Deepest core lithology and depth: light red-brown quartz-cemented quartz sandstone to 939.42 mbsf. Age of bedrock: (mid?) Devonian.
Parameter(s):
| # | Name | Short Name | Unit | Principal Investigator | Method/Device | Comment |
|---|---|---|---|---|---|---|
| 1 | DEPTH, sediment/rock | Depth sed | m | Geocode | ||
| 2 | Nannofossil abundance | Nannos abund | Watkins, David K | Abundance estimate | Very rare = 1-2 specimens, rare = 3-10 specimens, few = 10-100 specimens per longitudinal traverse of the 40 mm smear slide | |
| 3 | Nannofossils preservation | Nannos preserv | Watkins, David K | Poor = severely dissolved so that species identification is frequently impaired. Moderate = species identification only occasionally impaired by diagenesis | ||
| 4 | Braarudosphaera bigelowii | B. bigelowii | # | Watkins, David K | Counting | |
| 5 | Chiasmolithus altus | C. altus | # | Watkins, David K | Counting | |
| 6 | Chiasmolithus oamaruensis | C. oamaruensis | # | Watkins, David K | Counting | |
| 7 | Coccolithus pelagicus | C. pelagicus | # | Watkins, David K | Counting | |
| 8 | Dictyococcites bisectus | D. bisectus | # | Watkins, David K | Counting | |
| 9 | Dictyococcites daviesii | D. daviesii | # | Watkins, David K | Counting | |
| 10 | Dictyococcites hesslandii | D. hesslandii | # | Watkins, David K | Counting | |
| 11 | Dictyococcites productus | D. productus | # | Watkins, David K | Counting | |
| 12 | Dictyococcites scrippsae | D. scrippsae | # | Watkins, David K | Counting | |
| 13 | Reticulofenestra hampdenensis | R. hampdenensis | # | Watkins, David K | Counting | |
| 14 | Thoracosphaera sp. cf. T. heimii | Thoracosphaera sp. cf. T. heimii | # | Watkins, David K | Counting | |
| 15 | Thoracosphaera sp. cf. T. saxea | Thoracosphaera sp. cf. T. saxea | # | Watkins, David K | Counting | |
| 16 | Transversopontis pulcheroides | T. pulcheroides | # | Watkins, David K | Counting | |
| 17 | Coccosphaera pachyderma | C. pachyderma | # | Watkins, David K | Counting | |
| 18 | Specimen count | Sp count | # | Watkins, David K | Counting | |
| 19 | Number of species | Spec No | # | Watkins, David K | Counting |
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2147 data points
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