THALASSIOSIRA-PRAEOESTRUPII - A NEW DIATOM SPECIES FOR RECOGNIZING THE MIOCENE PLIOCENE EPOCH BOUNDARY IN COASTAL CALIFORNIA Academic Article uri icon

abstract

  • A new diatom species, Thalassiosira praeoestruppii Dumont, Baldauf and Barron is described. The 1st occurrence of T. praeoestrupii in coastal California diatom-bearing outcrops occurs between the last occurrence of Rouxia californica at 6.0Ma, and the 1st occurrence of Thalassiosira oestrupii at 5.1Ma. The latter 2 species have customarily been used to identify the Miocene/Pliocene boundary. Paleomagnetic studies at Santa Cruz, California, demonstrate that the first occurrence of T. praeoestrupii coincides with the top of magnetic polarity Chron 5, which closely approximates the Miocene/Pliocene Epoch boundary.-Authors

published proceedings

  • MICROPALEONTOLOGY

author list (cited authors)

  • DUMONT, M. P., BALDAUF, J. G., & BARRON, J. A.

citation count

  • 15

complete list of authors

  • DUMONT, MP||BALDAUF, JG||BARRON, JA

publication date

  • January 1986

publisher