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  • 1
    Publication Date: 2023-06-27
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice; Species
    Type: Dataset
    Format: text/tab-separated-values, 1266 data points
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  • 2
    Publication Date: 2023-06-27
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; Counting; CRP; CRP-1; CWS; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Lithologic unit/sequence; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice; Species; Specimen count; Visual description
    Type: Dataset
    Format: text/tab-separated-values, 207 data points
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  • 3
    Publication Date: 2023-05-12
    Keywords: -; Branch_Steram; Calcium carbonate; Carbon isotope excursion; Comment; Identification; Lithology/composition/facies; Marlborough, New Zealand; OUTCROP; Outcrop sample; Sample comment; SECTION, height; δ13C, carbonate; δ18O, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 1544 data points
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  • 4
    Publication Date: 2023-05-12
    Keywords: -; Branch_Steram; Calcium carbonate; Carbon isotope excursion; Comment; Identification; Lithology/composition/facies; Marlborough, New Zealand; OUTCROP; Outcrop sample; Sample comment; SECTION, height; δ13C, carbonate; δ18O, carbonate
    Type: Dataset
    Format: text/tab-separated-values, 1938 data points
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  • 5
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    PANGAEA
    In:  Supplement to: Slotnick, Benjamin S; Dickens, Gerald Roy; Hollis, Christopher J; Crampton, James; Strong, C Percy; Phillips, Austin (2015): The onset of the Early Eocene Climatic Optimum at Branch Stream, Clarence River valley, New Zealand. New Zealand Journal of Geology and Geophysics, 58(3), 262-280, https://doi.org/10.1080/00288306.2015.1063514
    Publication Date: 2023-05-12
    Description: We present new lithologic, biostratigraphic and carbon isotope records for a calcareous-rich ~84m thick, early Eocene, upper continental slope section now exposed along Branch Stream, Marlborough. Decimetre-scale limestone-marl couplets comprise the section. Several marl-rich intervals correspond to carbon isotope excursions (CIEs) representing increased 13C -depleted carbon fluxes to the ocean. These records are similar to those at nearby Mead Stream, except marl-rich intervals at Branch Stream are thicker with a wider d13C range. Comparison to other sites indicates the section spans ~53.4-51.6 Ma, the onset of the Early Eocene Climatic Optimum (EECO). The most prominent CIE is correlated with the K/X event (52.9 Ma). Prominent marl-rich intervals resulted from increased fluxes of terrigenous material and associated carbonate dilution. We find multiple warming events marked lowermost EECO, each probably signaling enhanced seasonal precipitation. Branch Stream bulk isotopic records suggest 'differential diagenesis' impacted the sequence during sediment burial.
    Keywords: Branch_Steram; Marlborough, New Zealand; OUTCROP; Outcrop sample
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 6
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    PANGAEA
    In:  Supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Occurrence, stratigraphic distribution and palaeoecology of Quaternary foraminifera from CRP-1. Terra Antartica, 5(3), 455-472, hdl:10013/epic.28299.d001
    Publication Date: 2023-06-27
    Description: Foraminifera are examined in twenty-six samples from a 44 metre succession of Quaternary glacial sediments recovered from the CRP-1 drillhole on Roberts Ridge, southwestern Ross Sea, Antarctica. In situ marine assemblages were documented in at least three of the six lithostratigraphic units, and it is likely that the remaining three interbedded diamicton units are also marine in origin. Peak foraminiferal diversities are documented in Unit 3.1 (73 species) and Unit 2.2 (32 species). Calcareous benthics dominate the assemblages, but may be accompanied by abundant occurrences of the planktonic Neogloboquadrina pachyderma. Low diversity agglutinated faunas appear in the uppermost strata of Units 4.1 and 2.2. A close relationship between lithofacics and foraminiferal biofacies points to marine environments that alternated between proximity to and distance from active glaciers and iceshelf fronts, with associated variations in salinity, sea-surface ice cover and the levels of rainout from debris-laden ice.
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice
    Type: Dataset
    Format: application/zip, 3 datasets
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  • 7
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    PANGAEA
    In:  Supplement to: Strong, C Percy; Webb, Peter-Noel (1998): Lower Miocene foraminifera from CRP-1 drillhole. Terra Antartica, 5(3), 515-520, hdl:10013/epic.28305.d001
    Publication Date: 2023-06-27
    Description: A faunal comprising 18 foraminiferal taxa wa recovered from a suite of 52 core samples from lower Miocene sandstone, claystone and diamictite in the CRP-1 drillhole, Cape Roberts, Antarctica. The fauna is characterised by low foraminiferal abundance and diversity, the absence of planktics, and typically, the presence of Cribroelphidium sp. and/or Melonis spp. These factors indicate deposition in an inner shelf or nearshore environment. Many of the foraminifers found in CRP-1 also occure in the upper Oligocene-Miocene sequences in CIROS-1 and DSDP-270, but the fauna provides no precise indication of age. Typical and distinctive species from CRP-1 are illustrated with SEM photomicrographs.
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 8
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    PANGAEA
    In:  Supplement to: Webb, Peter-Noel; Strong, C Percy (1998): Recycled Pliocene foraminifera from the CRP-1 Quaternary succession. Terra Antartica, 5(3), 473-478, hdl:10013/epic.28298.d001
    Publication Date: 2023-06-27
    Description: Mixed assemblages of Pliocene and Quaternary foraminifera occur within the Quaternary succession of the CRP-1 drillhole. Pliocene foraminifera are not present in the lowermost Unit 4.1. are rare in Unit 3.1 and 2.3, are relatively common in Units 2.2 and 2.1, and are absent in Unit 1.1. Fifteen and twelve species were documented in two of the samples from Units 2.2 and 2.1 respectively. A census count of foraminifera in a sample at 26.89 mbsf (Unit 2.2) indicated that 39% of the tests were from a Pliocene source, with the remaining 61% tests assigned to the in situ Quaternary assemblage. There appears to be a close correlation between the stratigraphic distribution of ice-rafted sediments and the test number and diversity of Pliocene taxa. It is concluded that Pliocene assemblages were not derived from submarine outcrops on Roberts Ridge, but are more likely to have been rafted to the site via major trunk valley drainage systems such as operated within the Mackay and Ferrar glacial valleys. The co-occurrence of marine biota (including foraminifera), fossil wood, pollen, and igneous clasts in the Quaternary succession of CRP-l, points to the marine and terrestrial facies of the Pliocene Sirius Group as a likely source. A major episode of erosion and transport of sediment into the offshore marine basins at about ~1 Ma may have been triggered by dynamism in the ice sheet-glacier system, an episode of regional uplift in the Transantarctic Mountains, sea level oscillations and associated changes in the land-to-sea drainage baselines, or some combination of these factors.
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice
    Type: Dataset
    Format: application/zip, 2 datasets
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  • 9
    Publication Date: 2023-06-27
    Keywords: 16 km ENE Cape Roberts; Cape Roberts Project; Core wireline system; CRP; CRP-1; CWS; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Foraminifera; Fossil content; Lithologic unit/sequence; off Cape Roberts, Ross Sea, Antarctica; Sampling/drilling ice
    Type: Dataset
    Format: text/tab-separated-values, 220 data points
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  • 10
    Publication Date: 2023-07-10
    Keywords: 16 km ENE Cape Roberts; Ammoelphidiella antarctica; Cape Roberts Project; Cassidulinoides porrectus; Cibicides lobatulus; Cibicides refulgens; Core wireline system; Counting, foraminifera, benthic; Cribroelphidium incertum; CRP; CRP-1; CWS; Cyclogyra involvens; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; Ehrenbergina glabra; Fissurina sp.; Foraminifera, benthic; Glandulina antarctica; Globocassidulina crassa; Globocassidulina subglobosa; Lenticulina gibba; Lithologic unit/sequence; Miliolidae; Neogloboquadrina pachyderma; off Cape Roberts, Ross Sea, Antarctica; Planispirinoides bucculentus; Pseudobulimina chapmani; Pyrgoella sphaera; Sampling/drilling ice; Trifarina earlandi
    Type: Dataset
    Format: text/tab-separated-values, 44 data points
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