Articles | Volume 13, issue 9
Clim. Past, 13, 1129–1152, 2017
Clim. Past, 13, 1129–1152, 2017

Research article 11 Sep 2017

Research article | 11 Sep 2017

Astronomical calibration of the Ypresian timescale: implications for seafloor spreading rates and the chaotic behavior of the solar system?

Thomas Westerhold et al.

Data sets

Astronomical Calibration of the Ypresian Time Scale Thomas Westerhold, Ursula Röhl, Thomas Frederichs, Claudia Agnini, Isabella Raffi, James C. Zachos, and Roy H. Wilkens

Short summary
We assembled a very accurate geological timescale from the interval 47.8 to 56.0 million years ago, also known as the Ypresian stage. We used cyclic variations in the data caused by periodic changes in Earthäs orbit around the sun as a metronome for timescale construction. Our new data compilation provides the first geological evidence for chaos in the long-term behavior of planetary orbits in the solar system, as postulated almost 30 years ago, and a possible link to plate tectonics events.