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Watkins, David K; Wise, Sherwood W; Villa, Giuliana (2001): (Table 1) Range chart of calcareous nannofossils in samples of sediment core CRP-3. PANGAEA,, 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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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.
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
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.
#NameShort NameUnitPrincipal InvestigatorMethod/DeviceComment
1DEPTH, sediment/rockDepthmGeocode
2Nannofossil abundanceNannos abundWatkins, David KAbundance estimateVery rare = 1-2 specimens, rare = 3-10 specimens, few = 10-100 specimens per longitudinal traverse of the 40 mm smear slide
3Nannofossils preservationNannos preservWatkins, David KPoor = severely dissolved so that species identification is frequently impaired. Moderate = species identification only occasionally impaired by diagenesis
4Braarudosphaera bigelowiiB. bigelowii#Watkins, David KCounting
5Chiasmolithus altusC. altus#Watkins, David KCounting
6Chiasmolithus oamaruensisC. oamaruensis#Watkins, David KCounting
7Coccolithus pelagicusC. pelagicus#Watkins, David KCounting
8Dictyococcites bisectusD. bisectus#Watkins, David KCounting
9Dictyococcites daviesiiD. daviesii#Watkins, David KCounting
10Dictyococcites hesslandiiD. hesslandii#Watkins, David KCounting
11Dictyococcites productusD. productus#Watkins, David KCounting
12Dictyococcites scrippsaeD. scrippsae#Watkins, David KCounting
13Reticulofenestra hampdenensisR. hampdenensis#Watkins, David KCounting
14Thoracosphaera sp. cf. T. heimiiT. sp. cf. T. heimii#Watkins, David KCounting
15Thoracosphaera sp. cf. T. saxeaT. sp. cf. T. saxea#Watkins, David KCounting
16Transversopontis pulcheroidesT. pulcheroides#Watkins, David KCounting
17Coccosphaera pachydermaC. pachyderma#Watkins, David KCounting
18Specimen countSp count#Watkins, David KCounting
19Number of speciesSpec No#Watkins, David KCounting
2147 data points

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