Skip to main content
Article thumbnail
Location of Repository

Extending the astronomical ( polarity) time scale into the Miocene

By F.J. Hilgen, W. Krijgsman, C.G. Langereis, L.J. Lourens, A. Santarelli and W.J. Zachariasse


An astronomical time scale is presented for the late Miocene based on the correlation of characteristic sedimentary cycle\ud patterns in marine sections in the Mediterranean to the 65”N summer insolation curve of La90 [ 1,2] with present-day values\ud for the dynamical ellipticity of the Earth and tidd dissipation by the moon. This correlation yields ages for all sedimentary\ud cycles and hence also for the recorded polarity reversals, and planktonic foraminiferal and dinoflagellate events. The\ud Tortonian/Messinian (T/M) boundary placed at the first regular occurrence of the Globorofuliu conomiozea group in the\ud Mediterranean is dated at 7.24 Ma. The duration of the Messinian is estimated at 1.91 Myr because the Miocene/Pliocene\ud boundary has been dated previously at 5.33 Ma [3]. The new time scale is confirmed by “OAr/ 3gAr ages of volcanic beds and\ud by the number of sedimentary cycles in the younger part of the Mediterranean Messinian

Topics: Aardwetenschappen
Year: 1995
OAI identifier:
Download PDF:
Sorry, we are unable to provide the full text but you may find it at the following location(s):
  • (external link)
  • Suggested articles

    To submit an update or takedown request for this paper, please submit an Update/Correction/Removal Request.