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Westerhold, Thomas; Röhl, Ursula; Wilkens, Roy H; Gingerich, Philip D; Clyde, William C; Wing, Scott L; Bowen, Gabriel J; Kraus, Mary J (2017): Synchronizing early Eocene deep-sea and continental records from the Bighorn Basin Coring Project. PANGAEA, https://doi.org/10.1594/PANGAEA.875685, Supplement to: Westerhold, T et al. (2018): Synchronizing early Eocene deep-sea and continental records - cyclostratigraphic age models for the Bighorn Basin Coring Project drill cores. Climate of the Past, 14(3), 303-319, https://doi.org/10.5194/cp-14-303-2018

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Abstract:
A consistent chronostratigraphic framework is required to understand the effect of major paleoclimate perturbations on both marine and terrestrial ecosystems. Transient global warming events in the early Eocene, 56-54 Ma ago, show the impact of large scale carbon input into the ocean-atmosphere system. Here we provide the first time-scale synchronization of continental and marine deposits spanning the Paleocene-Eocene Thermal Maximum (PETM) and the interval just prior to the Eocene Thermal Maximum 2 (ETM-2). Cyclic variations in geochemical data come from continental drill cores of the Bighorn Basin Coring Project (BBCP, Wyoming, USA) and from marine deep-sea drilling deposits retrieved by the Ocean Drilling Program (ODP). Both are dominated by eccentricity modulated precession cycles used to construct a common cyclostratigraphic framework. Integration of age models results in a revised astrochronology for the PETM in deep-sea records that is now generally consistent with independent 3He age models. The duration of the PETM is estimated at ~200 kyr for the CIE and ~120 kyr for the associated pelagic clay layer. A common terrestrial and marine age model shows a concurrent major change in marine and terrestrial biotas ~200 kyr before ETM-2. In the Bighorn Basin, the change is referred to as Biohorizon B, and represents a period of significant mammalian turnover and immigration, separating the upper Haplomylus-Ectocion Range Zone from the Bunophorus Interval Zone and approximating the Wa-4-Wa-5 land mammal zone boundary. In sediments from ODP Site 1262 (Walvis Ridge), major changes in the biota at this time are documented by the radiation of a "2nd generation" of apical spine-bearing sphenoliths species (e.g., S. radians and S. editus), the emergence of T. orthostylus, and the marked decline of D. multiradiatus.
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Coverage:
Median Latitude: 44.538773 * Median Longitude: -108.520387 * South-bound Latitude: 44.416000 * West-bound Longitude: -108.887960 * North-bound Latitude: 44.768870 * East-bound Longitude: -108.105000
Date/Time Start: 2011-01-08T16:23:00 * Date/Time End: 2011-07-23T22:46:00
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11 datasets

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Datasets listed in this publication series

  1. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table 1) PETM age model for Polecat Bench (PCB) and ODP Sites 690, 1262, 1263, 1265, 1266, and 1267. https://doi.org/10.1594/PANGAEA.875608
  2. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table 2) Age model for Gilmore Hill (GMH) drill core and regional outcrops. https://doi.org/10.1594/PANGAEA.875625
  3. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S1) PCB L*,a* and b* color scanning data. https://doi.org/10.1594/PANGAEA.875653
  4. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S2) GMH L*,a* and b* color scanning data. https://doi.org/10.1594/PANGAEA.875654
  5. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S3) BSN L*,a* and b* color scanning data. https://doi.org/10.1594/PANGAEA.875655
  6. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S4) PCB X-ray fluorescence iron intenisty data. https://doi.org/10.1594/PANGAEA.875656
  7. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S5) GMH X-ray fluorescence iron intenisty data. https://doi.org/10.1594/PANGAEA.875667
  8. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S6) BSN X-ray fluorescence iron intenisty data. https://doi.org/10.1594/PANGAEA.875675
  9. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S7) Offsets between drilling depths (meters below surface, MBS) of Gillmore Hill (GMH) cores A and B used to develop the composite depth scale (meters composite depth, MCD). https://doi.org/10.1594/PANGAEA.875681
  10. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S8) Offsets between drilling depths (meters below surface, MBS) of Basin Substation (BSN) cores A and B used to develop the composite depth scale (meters composite depth, MCD). https://doi.org/10.1594/PANGAEA.875683
  11. Westerhold, T; Röhl, U; Wilkens, RH et al. (2017): (Table S9) Carbon and oxygen isotope values for pedogenic carbonate samples collected from Gilmore Hill core A organized by stratigraphic level. https://doi.org/10.1594/PANGAEA.875684