EGU21-11904, updated on 02 Aug 2022
https://doi.org/10.5194/egusphere-egu21-11904
EGU General Assembly 2021
© Author(s) 2022. This work is distributed under
the Creative Commons Attribution 4.0 License.

Deep-sea panoramas: Progress and remaining challenges in late Miocene stratigraphy and climate

Anna Joy Drury1,2, Thomas Westerhold1, David A. Hodell3, Mitchell Lyle4, Cédric M. John5, Amelia E. Shevenell6, Ursula Röhl1, and Roy Wilkens7
Anna Joy Drury et al.
  • 1University of Bremen, MARUM - Centre for Marine Environmental Sciences, Bremen, Germany
  • 2Department of Earth Sciences, University College London, Gower Street, London, WC1E 6BT, UK (a.j.drury@ucl.ac.uk)
  • 3Department of Earth Science, University of Cambridge, Cambridge, UK
  • 4College of Earth, Ocean, and Atmospheric Science, Oregon State University, Corvallis, Oregon 97331, USA
  • 5Department of Earth Science and Engineering, Imperial College London, London, UK
  • 6College of Marine Science, University of South Florida, St. Petersburg, FL, USA
  • 7University of Hawaii, School of Ocean and Earth Science and Technology, Honolulu, Hawaii 96822, USA

During the late Miocene, meridional sea surface temperature gradients, deep ocean circulation patterns, and continental configurations evolved to a state similar to modern day. Deep-sea benthic foraminiferal stable oxygen (δ18O) and carbon (δ13C) isotope stratigraphy remains a fundamental tool for providing accurate chronologies and global correlations, both of which can be used to assess late Miocene climate dynamics. Until recently, late Miocene benthic δ18O and δ13C stratigraphies remained poorly constrained, due to relatively poor global high-resolution data coverage.

Here, I present ongoing work that uses high-resolution deep-sea foraminiferal stable isotope records to improve late Miocene (chrono)stratigraphy. Although challenges remain, the coverage of late Miocene benthic δ18O and δ13C stratigraphies has drastically improved in recent years, with high-resolution records now available across the Atlantic and Pacific Oceans. The recovery of these deep-sea records, including the first astronomically tuned, deep-sea integrated magneto-chemostratigraphy, has also helped to improve the late Miocene geological timescale. Finally, I will briefly touch upon how our understanding of late Miocene climate evolution has improved, based on the high-resolution deep-sea archives that are now available.

How to cite: Drury, A. J., Westerhold, T., Hodell, D. A., Lyle, M., John, C. M., Shevenell, A. E., Röhl, U., and Wilkens, R.: Deep-sea panoramas: Progress and remaining challenges in late Miocene stratigraphy and climate, EGU General Assembly 2021, online, 19–30 Apr 2021, EGU21-11904, https://doi.org/10.5194/egusphere-egu21-11904, 2021.

Corresponding presentation materials formerly uploaded have been withdrawn.