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  • 2000-2004  (14)
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  • 1
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    Distribution of dinoflagellate cysts in Eocene-Oligocene sediments of DSDP Hole 38-338 (2004)
    PANGAEA
    Details
    Publication Date: 2023-11-01
    Keywords: 38-338; Achilleodinium biformoides; Achomosphaera alcicornu; Achomosphaera cf. alcicornu; Achomosphaera ramulifera; Achomosphaera sp.; Achomosphaera spp.; Adnatosphaeridium vittatum; Apectodinium parvum; Apteodinium spp.; Areoligera cf. coronata; Areoligera cf. medusettiformis; Areoligera coronata; Areoligera medusettiformis; Areoligera senonensis; Areoligera spp.; Areoligera tauloma; Areosphaeridium diktyoplokus; Areosphaeridium ebdonii; Areosphaeridium michoudii; Batiacasphaera baculata; Batiacasphaera compta; Batiacasphaera micropapillata; Batiacasphaera spp.; Caligodinium amiculum; Cerebrocysta bartonensis; Cerebrocysta cf. crassimurata; Cerebrocysta cf. delicata; Cerebrocysta magna; Cerebrocysta spp.; Cerodinium dartmoorium; Cerodinium depressum; Cerodinium pannuceum; Cerodinium striatum; Charlesdowniea columna; Charlesdowniea tenuivirgula; Chatangiella spp.; Chiropteridium galea; Chiropteridium lobospinosum; Cleistosphaeridium ancyreum; Cleistosphaeridium placacanthum; Cordosphaeridium cantharellum; Cordosphaeridium cf. cantharellum; Cordosphaeridium funiculatum; Cordosphaeridium inodes; Cordosphaeridium minimum; Cordosphaeridium spp.; Corrudinium incompositum; Criboperidinium guiseppei; Cribroperidinium sp.; Cyclonephelium sp.; Damassadinium abbreviatum; Dapsilidinium spp.; Deep Sea Drilling Project; Deflandrea granulata; Deflandrea oebisfeldensis; Deflandrea phosphoritica; DEPTH, sediment/rock; Dinoflagellate cyst; Dinoflagellate cyst indeterminata; Dinopterygium cladoides; Diphyes colligerum; Diphyes ficusoides; Distatodinium ellipticum; Distatodinium spp.; Dracodinium pachydermum; Dracodinium politum; Dracodinium varielongitudum; DRILL; Drilling/drill rig; DSDP; Eatonicysta ursulae; Electrocysta sp.; Enneadocysta arcuata; Enneadocysta fenestrata; Enneadocysta multicornuta; Glaphyrocysta divaricata; Glaphyrocysta exuberans; Glaphyrocysta ordinata; Glaphyrocysta reticulosa; Glaphyrocysta semitecta; Glaphyrocysta sp.; Glaphyrocysta spp.; Glomar Challenger; Heteraulacacysta leptalea; Heteraulacacysta porosa; Heteraulacacysta spp.; Histiocysta sp.; Histiocysta spp.; Homotryblium spp.; Hystrichokolpoma cinctum; Hystrichokolpoma rigaudiae; Hystrichosphaeropsis costae; Hystrichostrogylon clausenii; Impagidinium cf. aculeatum; Impagidinium cf. dispertitum; Impagidinium cf. elegans; Impagidinium cf. velorum; Impagidinium spp.; Impagidinium velorum; Kallosphaeridium spp.; Leg38; Leiospheres; Lejeunocysta spp.; Lentinia serrata; Lentinia spp.; Lingulodinium machaerophorum; Lithosphaeridium sp.; Lithosphaeridium spp.; Lycopodium; Melitasphaeridium pseudorecurvatum; Membranophoridinium spp.; Nematosphaeropsis sp.; North Atlantic/Norwegian Sea/PLATEAU; Operculodinium centrocarpum; Operculodinium sp.; Operculodinium spp.; Palaeocystodinium golzowense; Paucilobimorpha triradiata; Paucisphaeridium inversibuccinum; Pentadinium favatum; Pentadinium laticinctum granulatum; Pentadinium laticinctum laticinctum; Phthanoperidinium amoenum; Phthanoperidinium cf. echinatum; Phthanoperidinium cf. geminatum; Phthanoperidinium comatum; Phthanoperidinium distinctum; Phthanoperidinium echinatum; Phthanoperidinium eocenicum; Phthanoperidinium geminatum; Phthanoperidinium powellii; Phthanoperidinium regalis; Phthanoperidinium sp.; Polykrikos spp.; Pyxilla spp.; Rhombodinium draco; Rhombodinium rhomboidea; Rottnestia borussica; Samlandia chlamydophora; Selenopemphix armata; Selenopemphix spp.; Senegalinium sp.; Senegalinium spp.; Spinidinium sagittula; Spinidinium spp.; Spiniferella cornuta; Spiniferites pseudofurcatus; Spiniferites septatus; Spiniferites sp.; Spiniferites spp.; Svalbardella cooksoniae; Tectatodinium grande; Tectatodinium sp.; Tectatodinium spp.; Thalassiphora cf. pelagica; Thalassiphora delicata; Thalassiphora pelagica; Thalassiphora spp.; Wetzeliella articulata; Wetzeliella cf. solida; Wetzeliella ovalis; Wetzeliella spp.; Wilsonidium tabulatum
    Type: Dataset
    Format: text/tab-separated-values, 8748 data points
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  • 2
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    Dinocyst datum events of several holes in the Norwegian-Greenland Sea (2004)
    PANGAEA
    In:  Supplement to: Eldrett, James S; Harding, Ian C; Firth, John V; Roberts, Andrew P (2004): Magnetostratigraphic calibration of Eocene-Oligocene dinoflagellate cyst biostratigraphy from the Norwegian-Greenland Sea. Marine Geology, 204(1-2), 91-127, https://doi.org/10.1016/S0025-3227(03)00357-8
    Details
    Publication Date: 2024-01-09
    Description: The presence of abundant age-diagnostic dinoflagellate cysts in Ocean Drilling Program (ODP) Hole 913B (Leg 151), Deep Sea Drilling Project Hole 338 (Leg 38) and ODP Hole 643A (Leg 104) has enabled the development of a new biostratigraphy for the Eocene-Oligocene interval in the Norwegian-Greenland Sea. This development is important because the calcareous microfossils usually used for biostratigraphy in this age interval are generally absent in high latitude sediments as a result of dissolution. In parallel with this biostratigraphic analysis, we developed a magnetic reversal stratigraphy for these Norwegian-Greenland Sea sequences. This has allowed independent age determination and has enabled the dinocyst biostratigraphy to be firmly tied into the global geomagnetic polarity timescale (GPTS). The relatively high resolution of this study has enabled identification of dinoflagellate cyst assemblages that have affinities with those from the North Sea and the North Atlantic, which allows regional correlation. Correlation of each site with the GPTS has also allowed comparison of the stratigraphic record preserved in each drill-hole. Hole 913B is the most complete and is the best-preserved record of the Eocene and Oligocene in the Northern Hemisphere high latitudes, and can serve as a reference section for palaeoenvironmental reconstructions of this age interval.
    Keywords: 104-643A; 151-913B; 38-338; Deep Sea Drilling Project; DRILL; Drilling/drill rig; DSDP; Glomar Challenger; Joides Resolution; Leg104; Leg151; Leg38; North Atlantic/Norwegian Sea/PLATEAU; North Greenland Sea; Norwegian Sea; Ocean Drilling Program; ODP
    Type: Dataset
    Format: application/zip, 5 datasets
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  • 3
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    (Table 1) Dinocyst datum events from the Eocene-Oligocene of the Norwegian-Greenland Sea ODP and DSDP holes (2004)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 104-643A; 151-913B; 38-338; Abbreviation; Age, maximum/old; Age, minimum/young; Age model; Ageprofile Datum Description; Chronozone; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Joides Resolution; Leg104; Leg151; Leg38; North Atlantic/Norwegian Sea/PLATEAU; North Greenland Sea; Norwegian Sea; Ocean Drilling Program; ODP
    Type: Dataset
    Format: text/tab-separated-values, 477 data points
    Location Call Number Limitation Availability
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    DATA PANGAEA
  • 4
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    (Table 1) Age determination of ODP Site 145-883 (2001)
    PANGAEA
    In:  Supplement to: Kiefer, T; Sarnthein, Michael; Erlenkeuser, Helmut; Grootes, Pieter Meiert; Roberts, Andrew P (2001): North Pacific response to millennial-scale changes in ocean circulation over the last 60 kyr. Paleoceanography, 16(2), 179-189, https://doi.org/10.1029/2000PA000545
    Details
    Publication Date: 2024-01-09
    Description: Foraminifera-based sea surface temperature estimates in the northwest Pacific (Ocean Drilling Program Site 883; 51°N) varied by 4°C on millennial timescales over the last 60,000 calendar (cal) years, with the most prominent amplitudes during marine isotope stage 3. Age control is based on benthic d18O records, 14C ages, and on geomagnetic intensity variations at Site 883 tuned to the North Atlantic paleointensity stack since 75 ka (NAPIS-75), in turn, tied to the Greenland Ice Sheet Project 2 (GISP2) ice core chronology. On the basis of this tuning, northwest Pacific warm phases parallel Greenland cold stadials and viceversa. This contrasts with atmospheric heat transfer, expected to produce quasi-coeval signals across the Northern Hemisphere. The antiphasing may instead stem from variations in global thermohaline circulation. At its North Pacific terminus in the subarctic gyre, any slowdown or shutoff of North Atlantic Deep Water formation during Dansgaard-Oeschger stadials led to a turnoff or reduction of the upwelling of cold Pacific deepwater and thus, to striking, instantaneous, short-term warmings of surface water.
    Keywords: 145-883; Age, 14C AMS; Age, 14C milieu/reservoir corrected; Age, dated; Age, dated, error to older; Age, dated, error to younger; Age, dated material; Calendar age; Comment; COMPCORE; Composite Core; DEPTH, sediment/rock; Joides Resolution; Laboratory code/label; Leg145; North Pacific Ocean; Ocean Drilling Program; ODP; Reservoir age; Sample mass
    Type: Dataset
    Format: text/tab-separated-values, 199 data points
    Location Call Number Limitation Availability
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  • 5
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    Distribution of dinoflagellate cysts in Eocene-Oligocene sediments of ODP Hole 151-913B (2004)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 151-913B; Achomosphaera alcicornu; Achomosphaera cf. alcicornu; Achomosphaera ramulifera; Achomosphaera sp.; Achomosphaera spp.; Acritarcha; Adnatosphaeridium vittatum; Alterbidinium spp.; Apectodinium hyperacanthum; Apectodinium spp.; Areoligera cf. coronata; Areoligera medusettiformis; Areoligera spp.; Areosphaeridium diktyoplokus; Areosphaeridium ebdonii; Areosphaeridium michoudii; Batiacasphaera baculata; Batiacasphaera compta; Batiacasphaera hirsuta; Batiacasphaera micropapillata; Batiacasphaera spp.; Caligodinium amiculum; Caningia spp.; Cerebrocysta bartonensis; Cerebrocysta cf. crassimurata; Cerebrocysta cf. delicata; Cerebrocysta magna; Cerebrocysta spp.; Cerodinium dartmoorium; Cerodinium depressum; Cerodinium pannuceum; Cerodinium striatum; Charlesdowniea coleothrypta; Charlesdowniea columna; Charlesdowniea tenuivirgula; Chatangiella spp.; Chiropteridium galea; Chiropteridium lobospinosum; Cleistosphaeridium ancyreum; Cleistosphaeridium diversispinosum; Cleistosphaeridium placacanthum; Cordosphaeridium cantharellum; Cordosphaeridium fibrospinosum; Cordosphaeridium funiculatum; Cordosphaeridium inodes; Cordosphaeridium minimum; Cordosphaeridium spp.; Corrudinium incompositum; Criboperidinium guiseppei; Cribroperidinium sp.; Damassadinium abbreviatum; Damassadinium impages; Dapsilidinium spp.; Deflandrea cf. phosphoritica; Deflandrea granulata; Deflandrea heterophlycta; Deflandrea oebisfeldensis; Deflandrea phosphoritica; Deflandrea sp.; DEPTH, sediment/rock; Dinoflagellate cyst; Dinoflagellate cyst indeterminata; Dinopterygium cladoides; Diphyes cf. ficusoides; Diphyes colligerum; Diphyes ficusoides; Distatodinium ellipticum; Dracodinium condylus; Dracodinium pachydermum; Dracodinium spp.; Dracodinium varielongitudum; DRILL; Drilling/drill rig; Eatonicysta ursulae; Elytrocysta sp.; Enneadocysta arcuata; Enneadocysta fennstrata; Enneadocysta multicornuta; Fibrocysta spp.; Forinitnia spp.; Glaphyrocysta divaricata; Glaphyrocysta exuberans; Glaphyrocysta ordinata; Glaphyrocysta reticulosa; Glaphyrocysta semitecta; Glaphyrocysta vicina; Heteraulacacysta everriculata; Heteraulacacysta leptalea; Heteraulacacysta porosa; Histiocysta sp.; Histiocysta spp.; Homotryblium aculeatum; Homotryblium oceanicum; Homotryblium spp.; Horologinella sp.; Hystrichokolpoma cinctum; Hystrichokolpoma rigaudiae; Hystrichosphaeridium tubiferum; Hystrichosphaeropsis costae; Impagidinium aff. maculeatum; Impagidinium cf. aculeatum; Impagidinium cf. dispertitum; Impagidinium cf. velorum; Impagidinium elegans; Impagidinium sp.; Impagidinium spp.; Impagidinium velorum; Impagidinium victoranium; Joides Resolution; Kallosphaeridium spp.; Leg151; Leiospheres; Lejeunocysta spp.; Lentinia sp.; Lentinia wetzelii; Lingulodinium machaerophorum; Lingulodinium spp.; Lithosphaeridium sp.; Lithosphaeridium spp.; Lycopodium; Melitasphaeridium pseudorecurvatum; Membranilarnacia compressa; Membranilarnacia spp.; Membranophoridinium spp.; Nematosphaeropsis lemniscata; Nematosphaeropsis sp.; North Greenland Sea; Ocean Drilling Program; Odontochitina spp.; ODP; Oligosphaeridium pulcherrimum; Operculodinium centrocarpum; Operculodinium divergens; Operculodinium spp.; Palaeocystodinium bulliformum; Palaeocystodinium golzowense; Palaeocystodinium sp.; Palaeohystrichophora infusorioides; Palaeoperidinium pyrophorum; Paucilobimorpha triradiata; Paucisphaeridium inversibuccinum; Pentadinium favatum; Pentadinium laticinctum granulatum; Pentadinium laticinctum laticinctum; Pentadinium laticinctum lophophorum; Phelodinium spp.; Phthanoperidinium amoenum; Phthanoperidinium cf. geminatum; Phthanoperidinium cf. indistinctum; Phthanoperidinium cf. levimurum; Phthanoperidinium clithridium; Phthanoperidinium comatum; Phthanoperidinium distinctum; Phthanoperidinium echinatum; Phthanoperidinium eocenicum; Phthanoperidinium geminatum; Phthanoperidinium multispinum; Phthanoperidinium powellii; Phthanoperidinium regalis; Phthanoperidinium resistente; Phthanoperidinium spp.; Polykrikos spp.; Pyxilla spp.; Reticulosa actinocoronata; Rhombodinium draco; Rhombodinium politum; Rhombodinium rhomboidea; Rottnestia borussica; Samlandia chlamydophora; Selenopemphix spp.; Senegalinium sp.; Senegalinium spp.; Spinidinium spp.; Spiniferella cornuta; Spiniferites pseudofurcatus; Spiniferites septatus; Spiniferites sp.; Spiniferites spp.; Svalbardella cooksoniae; Tectatodinium grande; Tectatodinium sp.; Tectatodinium spp.; Thalassiphora delicata; Thalassiphora pelagica; Thalassiphora spp.; Wetzeliella articulata; Wetzeliella cf. ovalis; Wetzeliella cf. solida; Wetzeliella gochtii; Wetzeliella spp.
    Type: Dataset
    Format: text/tab-separated-values, 32316 data points
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  • 6
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    Distribution of dinoflagellate cysts in Eocene-Oligocene sediments of ODP Hole 104-643A (2004)
    PANGAEA
    Details
    Publication Date: 2024-01-09
    Keywords: 104-643A; Achomosphaera alcicornu; Achomosphaera sp.; Adnatosphaeridium vittatum; Araneosphaera araneosa; Areoligera medusisettiformis; Areoligera semicirculata; Areoligera spp.; Areoligera tauloma; Areosphaeridium diktyoplokus; Areosphaeridium ebdonii; Areosphaeridium michoudii; Azolla spp.; Batiacasphaera baculata; Batiacasphaera compta; Batiacasphaera micropapillata; Caligodinium amiculum; Cannosphaeropsis sp.; Cerebrocysta bartonensis; Cerebrocysta magna; Cerebrocysta spp.; Charlesdowniea coleothrypta; Charlesdowniea tenuivirgula; Chiropteridium galea; Cleistosphaeridium ancyreum; Cleistosphaeridium brevispinosum; Cleistosphaeridium placacanthum; Cordosphaeridium cantharellum; Cordosphaeridium funiculatum; Cordosphaeridium inodes; Cordosphaeridium minimum; Cordosphaeridium sp.; Cordosphaeridium spp.; Corrudinium incompositum; Criboperidinium guiseppei; Cribroperidinium sp.; Damassadinium abbreviatum; Damassadinium impages; Dapsilidinium spp.; Deflandrea granulata; Deflandrea phosphoritica; Deflandrea sp.; DEPTH, sediment/rock; Dinoflagellate cyst indeterminata; Dinopterygium cladoides; Diphyes colligerum; Diphyes ficusoides; Diphyes pseudoficusoides; Distatodinium ellipticum; Distatodinium paradoxum; Dracodinium pachydermum; DRILL; Drilling/drill rig; DSDP/ODP/IODP sample designation; Eatonicysta ursulae; Electrocysta sp.; Enneadocysta arcuata; Enneadocysta multicornuta; Enneadocysta penteformis; Glaphyrocysta divaricata; Glaphyrocysta exuberans; Glaphyrocysta ordinata; Glaphyrocysta reticulosa; Glaphyrocysta semitecta; Heteraulacacysta leptalea; Heteraulacacysta porosa; Homotryblium aculeatum; Homotryblium oceanicum; Hystrichokolpoma cinctum; Hystrichokolpoma rigaudiae; Hystrichosphaeridium tubiferum; Impagidinium aff. maculeatum; Impagidinium cf. velorum; Impagidinium dispertitum; Impagidinium elegans; Impagidinium spp.; Joides Resolution; Leg104; Lentinia serrata; Lentinia spp.; Lingulodinium machaerophorum; Lithosphaeridium spp.; Melitasphaeridium pseudorecurvatum; Nematosphaeropsis spp.; Norwegian Sea; Ocean Drilling Program; ODP; Operculodinium centrocarpum; Palaeocystodinium spp.; Paucilobimorpha triradiata; Pentadinium laticinctum granulatum; Pentadinium laticinctum laticinctum; Phthanoperidinium amoenum; Phthanoperidinium cf. eocenicum; Phthanoperidinium comatum; Phthanoperidinium distinctum; Phthanoperidinium echinatum; Phthanoperidinium geminatum; Phthanoperidinium levimurum; Phthanoperidinium regalis; Pyxilla spp.; Reticulosa actinocoronata; Reticulosa cf. actinocoronata; Rottnestia borussica; Samlandia chlamydophora; Sample code/label; Selenopemphix nephroides; Senegalinium spp.; Spiniferella cornuta; Spiniferites sp.; Spiniferites spp.; Svalbardella cooksoniae; Tectatodinium grande; Tectatodinium spp.; Thalassiphora delicata; Thalassiphora fenestrata; Thalassiphora pelagica; Wetzeliella articulata; Wetzeliella gochtii; Wetzeliella ovalis
    Type: Dataset
    Format: text/tab-separated-values, 3885 data points
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  • 7
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    (Table 3) Recalibration of Eocene-Oligocene diatom datums for ODP Hole 120-748B on the Kerguelen Plateau, Indian Ocean (2003)
    PANGAEA
    Details
    Publication Date: 2024-01-20
    Keywords: 120-748B; Age model; Ageprofile Datum Description; Chronozone; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Joides Resolution; Leg120; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 39 data points
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  • 8
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    (Table 3) Recalibration of Eocene-Oligocene diatom datums for ODP Hole 119-744A on the Kerguelen Plateau, Indian Ocean (2003)
    PANGAEA
    Details
    Publication Date: 2024-01-20
    Keywords: 119-744A; Age model; Ageprofile Datum Description; Chronozone; Comment; DEPTH, sediment/rock; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Leg119; Ocean Drilling Program; ODP; Standard deviation
    Type: Dataset
    Format: text/tab-separated-values, 34 data points
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  • 9
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    Magnetostratigraphic calibration of Southern Ocean diatom datums from the Eocene-Oligocene of Kerguelen Plateau (Ocean Drilling Program sites 744 and 748) (2003)
    PANGAEA
    In:  Supplement to: Roberts, Andrew P; Bicknell, Simon J; Byatt, Joanne; Bohaty, Steven M; Florindo, Fabio; Harwood, David M (2003): Magnetostratigraphic calibration of Southern Ocean diatom datums from the Eocene-Oligocene of Kerguelen Plateau (Ocean Drilling Program sites 744 and 748). Palaeogeography, Palaeoclimatology, Palaeoecology, 198(1-2), 145-168, https://doi.org/10.1016/S0031-0182(03)00397-3
    Details
    Publication Date: 2024-01-20
    Description: Ocean Drilling Program holes 744A and 748B represent key sections for calibration of Southern Ocean Eocene-Oligocene biostratigraphic zonations. Sites 744 and 748 were above the carbonate compensation depth throughout this time interval and contain good planktonic foraminiferal, calcareous nannofossil, and diatom biostratigraphic records. In particular, the Southern Ocean diatom biostratigraphic zonation for the Oligocene critically hinges on calibration of these two holes. Previous low-resolution magnetostratigraphic studies at these sites were hampered by limited sampling and technical difficulties, which prompted our high-resolution reinvestigation of the magnetostratigraphy. Magnetic polarity zonations for holes 744A and 748B were constructed after inspection of vector component plots at 1-cm stratigraphic intervals from continuous u-channel measurements. The magnetizations are generally stable and a robust polarity stratigraphy has been obtained for both holes. The increased resolution of our study and identification of persistent secondary overprints, which were not recognised in previous studies, suggests that the previously published interpretations need to be revised. Our magnetostratigraphic interpretations for both holes are constrained by foraminiferal and calcareous nannofossil datums, as well as by Sr isotope ages. We have calibrated four diatom datums, which are synchronous at the two studied sites, to the geomagnetic polarity timescale, including the first occurrence (FO) of Lisitzinia ornata (27.8 Ma), the FO of Rocella vigilans var. B (27.8 Ma), the FO of Cavitatus jouseanus (30.9 Ma) and the FO of Rhizosolenia oligocaenica (33.8 Ma). The synchroneity of these datums suggests that diatom biostratigraphy has considerable potential for Palaeogene biostratigraphic correlation in the Southern Ocean. Although the ages of some datums are obscured by an unconformity in Hole 744A, our age model from Hole 748B suggests age estimates for the last common occurrence of Rocella vigilans var. A (~29.0 Ma), the FO of Rocella vigilans var. A (30.0 Ma) and the FO of Rhizosolenia antarctica (33.2 Ma). It should also be noted that the last occurrence of the calcareous nannofossil Chiasmolithus altus occurs in Chron C8r rather than C8n in our revised magnetostratigraphic interpretation, which indicates that this datum is not diachronous between low and mid latitudes as had previously been suggested. Significant unconformities are documented in both holes, in the middle Oligocene and in the middle late Oligocene, respectively, which probably resulted from periods of enhanced circumpolar deep-water circulation.
    Keywords: 119-744A; 120-748B; DRILL; Drilling/drill rig; Indian Ocean; Joides Resolution; Leg119; Leg120; Ocean Drilling Program; ODP; South Indian Ridge, South Indian Ocean
    Type: Dataset
    Format: application/zip, 4 datasets
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  • 10
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    Chronostratigraphy of sediment core CRP-2/2A (Table 1) (2000)
    PANGAEA
    In:  Supplement to: Wilson, Gary S; Bohaty, Steven M; Fielding, Christopher R; Florindo, Fabio; Hannah, Mike J; Harwood, David M; McIntosh, W C; Naish, Tim R; Roberts, Andrew P; Sagnotti, Leonardo; Scherer, Reed P; Strong, C Percy; Versub, K L; Villa, Giuliana; Watkins, David K; Webb, Peter-Noel; Woolfe, Ken (2000): Chronostratigraphy of CRP-2/2A, Victoria Land Basin, Antarctica. Terra Antartica, 7(4), 647-654, hdl:10013/epic.28244.d001
    Details
    Publication Date: 2024-01-20
    Description: The 624.15 m glaciomarine sedimentary succession recovered in the CRP-2/2A drillcore comprises lower Oligocene (〈c. 31 Ma) to lower Miocene (18.5 Ma) strata that are overlain by a thin succession of Pliocene and Pleistocene strata. The age model for the CRP-2/2A drillhole, as presented in this paper, is based on combined microfossil biostratigraphy. 40Ar/39Ar age on volcanic material, 87Sr/86Sr analyses on mollusc shells, and correlation of a magnetic polarity zonation to the magnetic polarity time scale (MPTS). Between 25.92 and 109.05 metres below sea floor (mbsf), several alternative correlations to the MPTS are possible, all of which suggest that sediment accumulation rates averaged ~180 m/m.y. between unconformities, although actual sedimentation rates may have been higher. Between 109.05 and 306.65 mbsf, the age model is straightforward and average sedimentation rates were much higher (〉1000 m/m.y.). Between 306.65 mbsf and the bottom of the drillcore (624.15 mbsf), fewer datums are available to constrain the age model and unique correlation with the MPTS is not possible, although high average sediment accumulation rates are likely. A significant unconformity is identified at 306.65 mbsf, which may represent as much as 5 m.y. of missing time. Additional unconformities at 25.92 and 130.27 mbsf account for c. 16 and 2.5 m.y. of missing time, respectively. The Oligocene-lower Miocene interval documented in the CRP-2/2A drillcore spans about 13 million years, however, it is possible that more time is missing in sequence-bounding unconformities than is represented in the stratigraphic record recovered in the CRP-2/2A drillcore.
    Keywords: 14.2 km at 096° true from Cape Roberts; Age, comment; Age, dated; Age, dated, error to older; Age, dated, error to younger; Age, dated material; Cape Roberts Project; Core wireline system; CRP; CRP-2; CRP-2A; CWS; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; off Cape Roberts, Ross Sea, Antarctica; Sample code/label; Sampling/drilling from ice
    Type: Dataset
    Format: text/tab-separated-values, 199 data points
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