Doubrawa, Monika; Stassen, Peter; Robinson, Marci M; Babila, Tali L; Zachos, James C; Speijer, Robert P (2022): Shelf ecosystems along the U.S. Atlantic Coastal Plain prior to and during the Paleocene-Eocene Thermal Maximum [dataset bundled publication]. PANGAEA, https://doi.org/10.1594/PANGAEA.946947
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Published: 2022-08-09 • DOI registered: 2022-09-15
Abstract:
The Paleocene-Eocene Thermal Maximum (PETM) is the most pronounced climate event of the early Paleogene. It is characterized by negative δ18O and δ13C excursions recorded in sedimentary archives and a transient disruption of the marine biosphere. Bulk carbonate and foraminiferal δ13C records from Paleocene-Eocene core sections from the U.S. Atlantic Coastal Plain show an additional small, but distinct δ13C excursion below the onset of the PETM, coined the “pre-onset excursion” (POE). This study focuses on the South Dover Bridge (SDB) core in Maryland, where the Paleocene-Eocene transition is stratigraphically constrained by calcareous nannoplankton and stable isotope data, and in which the POE is well-expressed.
The site was situated in a shallow marine shelf setting near a major outflow of the paleo-Potomac River system (38°44′49″N latitude, 76°00′25″W longitude, Talbot County). We generated high-resolution benthic foraminiferal assemblage, stable isotope, trace-metal, grain size and clay mineralogy data. Data collection was done via core-sampling, and successive preparation of the samples according to each proxy.
Foraminifera underwent wet sieving (>63 μm), picking and mounting on Plummer slides. For geochemistry analysis Cibicidoides alleni (Paleocene) and Anomalinoides acutus (PETM) were used. Grain size data was collected with a Laser Diffraction Particle Analyzer. Stable isotope samples were analyzed with a Kiel Mat 253 gas source mass spectrometer system. All carbon isotope values are given in δ13C notation, relative to the PeeDee belemnite Standard (PDB). Trace elemental analyses were carried out on a Thermo Scientific Element XR Sector Field Inductively Coupled Plasma Mass Spectrometer (SF-ICP-MS). For clay mineral analysis, after Jackson treatment, a Philips PW 1380 diffractometer equipped with CuKalpha radiation, 45kV and 30mA graphite monochromator and was quantified through Rietveld Refinement for clay content.
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Doubrawa, Monika; Stassen, Peter; Robinson, Marci M; Babila, Tali L; Zachos, James C; Speijer, Robert P (2022): Shelf Ecosystems Along the U.S. Atlantic Coastal Plain Prior to and During the Paleocene‐Eocene Thermal Maximum: Insights Into the Stratigraphic Architecture. Paleoceanography and Paleoclimatology, 37(10), https://doi.org/10.1029/2022PA004475
Coverage:
Latitude: 38.746940 * Longitude: -76.006940
Date/Time Start: 2007-10-01T00:00:00 * Date/Time End: 2007-10-01T00:00:00
License:
Creative Commons Attribution 4.0 International (CC-BY-4.0)
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10 datasets
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Datasets listed in this bundled publication
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Relative abundances of benthic foraminifera and biogroups in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946936
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Absolute abundances of benthic foraminifera in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946935
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Bulk carbonate stable isotope ratios in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946943
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Carbon content in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946938
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Benthic foraminifera stable isotope ratios in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946945
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Temperature estimates based on Mg/Ca and δ18O for the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946946
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Grain size distribution in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946939
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Kaolinite content in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946940
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Planktic to benthic foraminifera ratio in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946941
- Doubrawa, M; Stassen, P; Robinson, MM et al. (2022): Sand fraction in the South Dover Bridge core. https://doi.org/10.1594/PANGAEA.946937