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Westerhold, Thomas; Röhl, Ursula; Frederichs, Thomas; Bohaty, Steven M; Zachos, James C (2015): Natural remanent magnetization (NRM) from ODP Site 1263 covering magnetochron C20r and C21n and high-resolution bulk carbon isotope (d13C) records from Sites 702 and 1263. PANGAEA, https://doi.org/10.1594/PANGAEA.845986, Supplement to: Westerhold, T et al. (2015): Astronomical calibration of the geological timescale: closing the middle Eocene gap. Climate of the Past, 11, 1181-1195, https://doi.org/10.5194/cp-11-1181-2015

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Abstract:
To explore cause and consequences of past climate change, very accurate age models such as those provided by the astronomical timescale (ATS) are needed. Beyond 40 million years the accuracy of the ATS critically depends on the correctness of orbital models and radioisotopic dating techniques. Discrepancies in the age dating of sedimentary successions and the lack of suitable records spanning the middle Eocene have prevented development of a continuous astronomically calibrated geological timescale for the entire Cenozoic Era. We now solve this problem by constructing an independent astrochronological stratigraphy based on Earth's stable 405 kyr eccentricity cycle between 41 and 48 million years ago (Ma) with new data from deep-sea sedimentary sequences in the South Atlantic Ocean. This new link completes the Paleogene astronomical timescale and confirms the intercalibration of radioisotopic and astronomical dating methods back through the Paleocene-Eocene Thermal Maximum (PETM, 55.930 Ma) and the Cretaceous-Paleogene boundary (66.022 Ma). Coupling of the Paleogene 405 kyr cyclostratigraphic frameworks across the middle Eocene further paves the way for extending the ATS into the Mesozoic.
Project(s):
Coverage:
Median Latitude: -32.735360 * Median Longitude: -2.685736 * South-bound Latitude: -50.946000 * West-bound Longitude: -26.368600 * North-bound Latitude: -28.532660 * East-bound Longitude: 2.779700
Date/Time Start: 1987-04-13T15:45:00 * Date/Time End: 2003-04-05T10:15:00
Size:
13 datasets

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Datasets listed in this publication series

  1. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S1) Bulk stable isotope data of ODP Hole 114-702B. https://doi.org/10.1594/PANGAEA.845974
  2. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S10) Astronomical tuning age tie points. https://doi.org/10.1594/PANGAEA.846069
  3. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S11) Comparison of magnetochron boundary ages in million years. https://doi.org/10.1594/PANGAEA.846073
  4. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S12) Comparison of magnetochron boundary durations in million years. https://doi.org/10.1594/PANGAEA.846081
  5. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S13) Comparison of durations of magnetochrons in million years including uncertainties in magnetic anomaly width. https://doi.org/10.1594/PANGAEA.849279
  6. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S2) Bulk stable isotope data of ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.845978
  7. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S3) ODP 208-1263 raw inclination, declination, and intensity data for each measurement step. https://doi.org/10.1594/PANGAEA.846008
  8. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S4) Magnetostratigraphy of ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.846009
  9. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S5) ODP Hole 114-702B and Site 208-1263 Calcareous Nannofossil datums. https://doi.org/10.1594/PANGAEA.846016
  10. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S6) Relative and absolute 405-kyr eccentricity cycle age model for ODP Hole 114-702B and Site 208-1263. https://doi.org/10.1594/PANGAEA.846028
  11. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S7) Offsets applied to cores from ODP Holes 208-1263A, 208-1263B, 208-1263C. https://doi.org/10.1594/PANGAEA.846031
  12. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S8) List of tie points to create the revised composite depth scale (rmcd) for ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.846066
  13. Westerhold, T; Röhl, U; Frederichs, T et al. (2015): (Table S9) Paleomagnetic data interpretation from ODP Site 208-1263. https://doi.org/10.1594/PANGAEA.846068