DIATOM STRATIGRAPHY OF THE LOWER PLIOCENE PART OF THE SISQUOC FORMATION, HARRIS GRADE SECTION, CALIFORNIA Academic Article uri icon

abstract

  • Lower Pliocene diatoms were studied from the Sisquoc Formation and lowermost Foxen Mudstone, exposed along Harris Grade N of Lompoc, California, to refine the diatom biostratigraphy of post-Monterey Formation sediments in California. Sixty-seven diatom taxa were identified in the 25 samples examined from the 790m thick (2950ft) section. The diatoms are assignable to the uppermost Nitzschia reinholdii Zone and Thalassiosira oestrupii Zone of Barron (1981), and 5 tentative subzones for local correlation are proposed. Regional correlations and taxon occurrence are discussed, and the base of the Nitzschia reinholdii Zone is redefined as at the last occurrence of Thalassionema schraderi.-Authors

published proceedings

  • MICROPALEONTOLOGY

author list (cited authors)

  • BARRON, J. A., & BALDAUF, J. G.

citation count

  • 11

complete list of authors

  • BARRON, JA||BALDAUF, JG

publication date

  • January 1986

publisher