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  • 1
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    Age, biostratigraphic and paleomagnetic events at DSDP Leg 94
    PANGAEA
    In:  Supplement to: Baldauf, Jack G; Thomas, Ellen; Clement, Bradford M; Takayama, Toshiaki; Weaver, Philip PE; Backman, Jan; Jenkins, G; Mudie, Peta J; Westberg-Smith, M J (1987): Magnetostratigraphic and biostratigraphic synthesis, Deep Sea Drilling Project Leg 94. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 1159-1205, https://doi.org/10.2973/dsdp.proc.94.146.1987
    Details
    Publication Date: 2023-05-12
    Description: During DSDP Leg 94 sediment was recovered from 22 holes at six sites situated between 37° and 53°N in the North Atlantic. Paleomagnetic, calcareous nannofossil, foraminiferal, diatom, radiolarian, and dinocyst stratigraphic studies were completed. The excellent magnetostratigraphic results, the near-complete recovery, and the abundant fossil content of the sediment allowed refinement of these stratigraphies, especially for the upper Pliocene-Holocene. Because the Leg 94 sites span middle and high North Atlantic latitudes, it is possible to use them to evaluate the synchrony of late Pliocene to Holocene datums.
    Keywords: Deep Sea Drilling Project; DSDP
    Type: Dataset
    Format: application/zip, 6 datasets
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  • 2
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    Planktonic foraminifera abundances and isotopes of Late Quaternary sediments off New Zealand
    PANGAEA
    In:  Supplement to: Weaver, Philip PE; Carter, Lionel; Neil, Helen L (1998): Response of surface water masses and circulation to Late Quaternary climate change east of New Zealand. Paleoceanography, 13(1), 70-83, https://doi.org/10.1029/97PA02982
    Details
    Publication Date: 2023-05-12
    Description: A series of cores from east of New Zealand have been examined to determine the paleoceanographic history of the late Quaternary in the SW Pacific using planktonic foraminiferal data. Distinct shifts of species can be seen between glacial and interglacial times especially south of Chatham Rise east of South Island. Foraminiferal fragmentation ratios and benthic/planktonic foraminiferal ratios both show increased dissolution during glacials, especially isotope stage 2 to the south of Chatham Rise. The present-day Subtropical Convergence appears to be tied to the Chatham Rise at 44°S, but during glacial times this rise separated cold water to the south from much warmer water to the north, with an associated strong thermal gradient across the rise. We estimate that this gradient could have presented as much as an 8°C temperature change across 4° of latitude during the maximum of the last ice age. There is only weak evidence of the Younger Dryas cool event, but there is a clear climatic optimum between 8 and 6.4 ka with temperatures 1°-2°C higher than the present day. The marine changes compare well with vegetational changes on both South and North Island.
    Type: Dataset
    Format: application/zip, 23 datasets
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  • 3
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    (Table 2) Age determination of sediment cores from the Portuguese Margin (2014)
    PANGAEA
    In:  Supplement to: Rogerson, Mike; Rohling, Eelco J; Weaver, Philip PE (2006): Promotion of meridional overturning by Mediterranean-derived salt during the last deglaciation. Paleoceanography, 21(4), PA4101, https://doi.org/10.1029/2006PA001306
    Details
    Publication Date: 2023-02-07
    Description: We demonstrate that changes in the behavior of the Mediterranean Outflow Water (MOW) prior to and through the last deglaciation played an important role in promoting Meridional Overturning Circulation (MOC). Estimation of past MOW salt and heat fluxes indicates that they gradually increased through the last deglaciation. Between 17.5 and 14.6 thousand years ago (ka B.P., where B.P. references year 1950), net evaporation from the Mediterranean exported sufficient fresh water from the North Atlantic catchment to cause an average salinity increase of 0.5 psu throughout the upper 2000 m of the entire North Atlantic to the north of 25°N. Combined with rapid intensification and shoaling of the MOW plume, which we identify around 15-14.5 ka B.P., this deglacial MOW-related salt accumulation preconditioned the North Atlantic for abrupt resumption of the MOC at 14.6 ka B.P.
    Keywords: Age, 14C AMS; Age, 14C milieu/reservoir corrected (-400 yr); Age, dated; Age, dated standard deviation; Calendar age; D13686; D13896; D13900; D249; DEPTH, sediment/rock; Discovery (1962); Elevation of event; Event label; Laboratory code/label; Latitude of event; Longitude of event; PC; Piston corer; Portuguese Margin
    Type: Dataset
    Format: text/tab-separated-values, 32 data points
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  • 4
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    Isotopic ratios and CaCO3 content in sediment core U938
    PANGAEA
    Details
    Publication Date: 2023-05-12
    Keywords: AGE; Calcium carbonate; DEPTH, sediment/rock; GC; Globigerina bulloides, δ13C; Globigerina bulloides, δ18O; Gravity corer; U938; Uvigerina sp., δ13C; Uvigerina sp., δ18O
    Type: Dataset
    Format: text/tab-separated-values, 215 data points
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  • 5
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    (Table 1) Ages of planktonic foraminiferal datums at Leg 94 Sites
    PANGAEA
    In:  Supplement to: Weaver, Philip PE; Clement, Bradford M (1987): Magnetobiostratigraphy of planktonic foraminiferal datums: Deep Sea Drilling Project Leg 94, North Atlantic. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 815-829, https://doi.org/10.2973/dsdp.proc.94.120.1987
    Details
    Publication Date: 2023-06-27
    Description: The six Leg 94 sites have produced a unique data set from a north-south transect of sites, all with good paleomagnetic records, and all but one with above-average accumulation rates. We show that it is necessary to have high accumulation rates to obtain good quality magnetobiostratigraphies, and that it is difficult to correlate geological sequences over distances of several hundred kilometers without independent age control. Using the paleomagnetically derived ages for species ranges, we show several examples of diachronic first and last appearance datums between the core sites. This has enabled us to test the existing zonal schemes for the Pliocene-Pleistocene and to identify new zonal markers.
    Keywords: 94-606; 94-606A; 94-607; 94-607A; 94-608; 94-608A; 94-609; 94-609B; 94-610A; 94-610E; 94-611; 94-611C; Age model; Age model, optional; Ageprofile Datum Description; Comment; Comment 2 (continued); Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; Elevation of event; Event label; Glomar Challenger; Latitude of event; Leg94; Longitude of event; North Atlantic/FLANK; North Atlantic/RIDGE
    Type: Dataset
    Format: text/tab-separated-values, 554 data points
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  • 6
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    (Fig. 3) Age model of sediment core D11957P
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: Age model; Age model, SPECMAP chronology, Imbrie et al. (1984); D11957P; D187; DEPTH, sediment/rock; Discovery (1962); Isotopic event; PC; Piston corer
    Type: Dataset
    Format: text/tab-separated-values, 14 data points
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  • 7
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    (Table 1) Planktonic foraminiferal communities at DSDP Holes 94-609B and 94-609
    PANGAEA
    In:  Supplement to: Hooper, P W P; Weaver, Philip PE (1987): Paleoceanographic significance of late Miocene to early Pliocene planktonic foraminifers at Deep Sea Drilling Project Site 609. In: Ruddiman, WF; Kidd, RB; Thomas, E; et al. (eds.), Initial Reports of the Deep Sea Drilling Project, Washington (U.S. Govt. Printing Office), 94, 925-934, https://doi.org/10.2973/dsdp.proc.94.129.1987
    Details
    Publication Date: 2023-06-27
    Description: The planktonic foraminifers in 124 samples from Holes 609 and 609B have been analyzed quantitatively to see whether oceanographic events in the late Miocene and early Pliocene (6.5-4.0 Ma) are reflected in the distribution of individual species. Major changes in sea-surface temperature and bottom-water circulation are postulated, mainly on the basis of the coiling-direction ratios in Neogloboquadrina pachyderma (Ehrenberg) and a dissolution index. A cool interval peaking at around 6.2 Ma was followed by climatic fluctuations, possibly indicative of glacial cycles, before a general warming in the Pliocene. Intense dissolution of CaCO3 at this site on both sides of the Miocene/Pliocene boundary is inferred to have resulted from the presence of Antarctic Bottom Water, and an influx of less aggressive North Atlantic Deep Water is indicated at the actual boundary. These climatic and oceanographic changes are tentatively linked to the Messinian salinity crisis in the Mediterranean.
    Keywords: 94-609; 94-609B; Counting 〉125 µm fraction; Deep Sea Drilling Project; DEPTH, sediment/rock; DRILL; Drilling/drill rig; DSDP; DSDP/ODP/IODP sample designation; Event label; Foraminifera, benthic; Globigerina apertura; Globigerina bulloides; Globigerina decoraperta; Globigerina eamesi; Globigerina falconensis; Globigerina nepenthes; Globigerina quinqueloba; Globigerina woodi; Globigerinella aequilateralis; Globigerinella calida; Globigerinita glutinata; Globigerinita uvula; Globigerinoides obliquus; Globigerinoides quadrilobatus; Globigerinoides ruber; Globigerinoides trilobus; Globorotalia cibaoensis; Globorotalia conoidea; Globorotalia crassaformis; Globorotalia crassula; Globorotalia hirsuta; Globorotalia inflata; Globorotalia margaritae; Globorotalia puncticulata; Globorotalia scitula; Globorotalia sphericomiozea; Glomar Challenger; Leg94; Neogloboquadrina acostaensis dextral; Neogloboquadrina acostaensis sinistral; Neogloboquadrina atlantica dextral; Neogloboquadrina atlantica sinistral; Neogloboquadrina continuosa; Neogloboquadrina dutertrei; Neogloboquadrina humerosa; Neogloboquadrina pachyderma dextral; Neogloboquadrina pachyderma sinistral; North Atlantic/FLANK; Orbulina suturalis; Orbulina universa; Sample, optional label/labor no; Sample code/label; Siliceous microfossils; Sphaeroidinellopsis seminulina; Sphaeroidinellopsis sp.
    Type: Dataset
    Format: text/tab-separated-values, 5456 data points
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  • 8
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    (Table 1) Stratigraphic distribution of Globorotalia taxa in DSDP Site 81-552_Site in the North Atlantic
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 81-552_Site; Age, maximum/old; Age, minimum/young; Ageprofile Datum Description; COMPCORE; Composite Core; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DSDP; Glomar Challenger; Leg81; North Atlantic/PLATEAU; Stage
    Type: Dataset
    Format: text/tab-separated-values, 18 data points
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  • 9
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    (Table 1) Age determination of planktonic foraminiferal datums in DSDP Site 94-606 from the North Atlantic
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 94-606; 94-606A; Age, maximum/old; Age, minimum/young; Age, paleomagnetic; Ageprofile Datum Description; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg94; North Atlantic/FLANK
    Type: Dataset
    Format: text/tab-separated-values, 83 data points
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  • 10
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    (Table 1) Age determination of planktonic foraminiferal datums in DSDP Site 94-607 from the North Atlantic
    PANGAEA
    Details
    Publication Date: 2023-06-27
    Keywords: 94-607; 94-607A; Age, maximum/old; Age, minimum/young; Age, paleomagnetic; Ageprofile Datum Description; Deep Sea Drilling Project; Depth, bottom/max; DEPTH, sediment/rock; Depth, top/min; DRILL; Drilling/drill rig; DSDP; Event label; Glomar Challenger; Leg94; North Atlantic/FLANK
    Type: Dataset
    Format: text/tab-separated-values, 88 data points
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