Articles | Volume 11, issue 9
Clim. Past, 11, 1181–1195, 2015
https://doi.org/10.5194/cp-11-1181-2015

Special issue: Climatic and biotic events of the Paleogene

Clim. Past, 11, 1181–1195, 2015
https://doi.org/10.5194/cp-11-1181-2015

Research article 23 Sep 2015

Research article | 23 Sep 2015

Astronomical calibration of the geological timescale: closing the middle Eocene gap

T. Westerhold et al.

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Cited articles

Aubry, M. P.: From Chronology to Stratigraphy: Interpreting the Lower and Middle Eocene Stratigraphic Record in the Atlantic Ocean, in: Geochronology, Time Scales and Global Stratigraphic Correlation, edited by: Berggren, W. A., Kent, D. V., Aubry, M. P., and Hardenbol, J., SEPM, Spec. Publ., 213–274, 1995.
Cande, S. C. and Kent, D. V.: A New Geomagnetic Polarity Time Scale for the late Cretaceous and Cenozoic, J. Geophys. Res., 97, 13917–913951, 1992.
Cande, S. C. and Kent, D. V.: Revised calibration of the geomagnetic polarity timescale for the Late Cretaceous and Cenozoic, J. Geophys. Res., 100, 6093–6095, 1995.
Channell, J. E. T., Hodell, D. A., Singer, B. S., and Xuan, C.: Reconciling astrochronological and 40Ar / 39Ar ages for the Matuyama-Brunhes boundary and late Matuyama Chron, Geochem. Geophys. Geosys., 11, Q0AA12, https://doi.org/10.1029/2010GC003203, 2010.
Charles, A. J., Condon, D. J., Harding, I. C., Pälike, H., Marshall, J. E. A., Cui, Y., Kump, L., and Croudace, I. W.: Constraints on the numerical age of the Paleocene-Eocene boundary, Geochem. Geophys. Geosys., 12, Q0AA17, https://doi.org/10.1029/2010gc003426, 2011.
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Short summary
Testing hypotheses for mechanisms and dynamics of past climate change relies on the accuracy of geological dating. Development of a highly accurate geological timescale for the Cenozoic Era has previously been hampered by discrepancies between radioisotopic and astronomical dating methods, as well as a stratigraphic gap in the middle Eocene. We close this gap and provide a fundamental advance in establishing a reliable and highly accurate geological timescale for the last 66 million years.