Poore, Richard Z; Matthews, R K (1984): Stable carbon and oxygen isotope ratios of late Eocene and Oligocene foraminifera from the Atlantic Ocean [dataset publication series]. PANGAEA, https://doi.org/10.1594/PANGAEA.691314, Supplement to: Poore, RZ; Matthews, RK (1984): Oxygen isotope ranking of late Eocene and Oligocene planktonic foraminifers: implications for Oligocene sea-surface temperatures and global ice-volume. Marine Micropaleontology, 9(2), 111-134, https://doi.org/10.1016/0377-8398(84)90007-0
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Abstract:
Oxygen isotope analyses of late Eocene and Oligocene planktonic foraminifers from low and middle latitude sites in the Atlantic Basin show that different species from the same samples can yield significantly different isotopic values. The range of isotopic values observed between species is greatest at low-latitudes and declines poleward. Many planktonic foraminifers exhibit a systematic isotopic ranking with respect to each other and can therefore be grouped on the basis of their isotopic ranking. The isotopic ranking of some taxa, however, appears to vary geographically and/or through time.
Isotopic and paleontologic data from DSDP Site 522 indicate that commonly used isotopic temperature scales underestimate Oligocene sea surface temperatures. We suggest these temperature scales require revision to reflect the presence of Oligocene glaciation. Comparison of isotopic and paleontologic data from Sites 522, 511 and 277 suggests cold, low-salinity surface waters were present in high southern latitudes during the early Oligocene. Lowsalinity, high latitude surface waters could be caused by Eocene/Oligocene paleogeography or by the production of warm saline bottom water.
Project(s):
Deep Sea Drilling Project (DSDP)
Coverage:
Median Latitude: -10.218000 * Median Longitude: -12.490500 * South-bound Latitude: -26.114000 * West-bound Longitude: -19.851300 * North-bound Latitude: 5.678000 * East-bound Longitude: -5.129700
Date/Time Start: 1975-02-22T00:00:00 * Date/Time End: 1980-05-06T00:00:00
Event(s):
41-366_Site * Latitude: 5.678000 * Longitude: -19.851300 * Date/Time: 1975-02-22T00:00:00 * Elevation: -2853.0 m * Penetration: 12.175 m * Recovery: 5.799 m * Location: North Atlantic/CONT RISE * Campaign: Leg41 * Basis: Glomar Challenger * Method/Device: Composite Core (COMPCORE) * Comment: 91 cores; 856.5 m cored; 28.5 m drilled; 67.7% recovery
73-522 * Latitude: -26.114000 * Longitude: -5.129700 * Date/Time: 1980-05-06T00:00:00 * Elevation: -4441.0 m * Penetration: 148.7 m * Recovery: 137.6 m * Location: South Atlantic/PLATEAU * Campaign: Leg73 * Basis: Glomar Challenger * Method/Device: Drilling/drill rig (DRILL) * Comment: 36 cores; 143.8 m cored; 5 m drilled; 95.7 % recovery
License:
Creative Commons Attribution 3.0 Unported (CC-BY-3.0)
Size:
2 datasets
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Datasets listed in this publication series
- Poore, RZ; Matthews, RK (1984): (Table 1) Stable carbon and oxygen isotope ratios of Late Eocene to Oligocene foraminifera from ODP Site 41-366 of the North Atlantic Ocean. https://doi.org/10.1594/PANGAEA.691311
- Poore, RZ; Matthews, RK (1984): (Table 1) Stable carbon and oxygen isotope ratios of Late Eocene to Oligocene foraminifera from ODP Hole 73-522 of the South Atlantic Ocean. https://doi.org/10.1594/PANGAEA.691312