Calcareous nannofossil biostratigraphy of the California margin

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doi: 10.2973/odp.proc.sr.167.204.2000
Author(s): Fornaciari, Eliana
Author Affiliation(s): Primary:
Universita di Padova, Dipartimento di Geologia, Paleontologia e Geofisica, Padua, Italy
Other:
Hokkaido University, Japan
Ocean Drilling Program, United States
California State University at Long Beach, United States
Stockholm University, Sweden
Museum National d'Histoire Naturelle, France
University of California at Santa Cruz, United States
Lamont-Doherty Earth Observatory, United States
Université Louis Pasteur, France
Universita di Padova, Italy
Universität München, Federal Republic of Germany
Rosenstiel School of Marine and Atmospheric Science, United States
Indiana University of Pennsylvania, United States
Florida State University, United States
Oregon State University, United States
Universidad Nacional Autónoma de Mexico, United States
Yamagata University, Japan
Mount Allison University, Canada
University of Southampton, United Kingdom
Universidad de Sonora, Mexico
University of Erlangen, Federal Republic of Germany
University of Tokyo, Japan
University College London, United Kingdom
Geological Survey of Japan, Japan
Volume Title: Proceedings of the Ocean Drilling Program, scientific results, California margin; covering Leg 167 of the cruises of the drilling vessel JOIDES Resolution, Acapulco, Mexico, to San Francisco, California, sites 1010-1022, 20 April-16 June 1996
Volume Author(s): Lyle, Mitchell; Koizumi, Itaru; Richter, Carl; Behl, Richard J.; Bodén, Per; Caulet, Jean-Pierre; Delaney, Margaret L.; deMenocal, Peter; Desmet, Marc; Fornaciari, Eliana; Hayashida, Akira; Heider, Franz; Hood, Julie A.; Hovan, Steven A.; Janecek, Thomas R.; Janik, Aleksandra G.; Kennett, James P.; Lund, David; Machain Castillo, Maria L.; Maruyama, Toshiaki; Merrill, Russell B.; Mossman, David J.; Pike, Jennifer; Ravelo, A. Christina; Rozo Vera, Gloria A.; Stax, Rainer; Tada, Ryuji; Thurow, Jürgen W.; Yamamoto, Masanobu; Nessler, Susan; Miller, Christine M.; Peters, Lorri L.
Source: Proceedings of the Ocean Drilling Program, scientific results, California margin; covering Leg 167 of the cruises of the drilling vessel JOIDES Resolution, Acapulco, Mexico, to San Francisco, California, sites 1010-1022, 20 April-16 June 1996, Mitchell Lyle, Itaru Koizumi, Carl Richter, Richard J. Behl, Per Bodén, Jean-Pierre Caulet, Margaret L. Delaney, Peter deMenocal, Marc Desmet, Eliana Fornaciari, Akira Hayashida, Franz Heider, Julie A. Hood, Steven A. Hovan, Thomas R. Janecek, Aleksandra G. Janik, James P. Kennett, David Lund, Maria L. Machain Castillo, Toshiaki Maruyama, Russell B. Merrill, David J. Mossman, Jennifer Pike, A. Christina Ravelo, Gloria A. Rozo Vera, Rainer Stax, Ryuji Tada, Jürgen W. Thurow, Masanobu Yamamoto, Susan Nessler, Christine M. Miller and Lorri L. Peters. Proceedings of the Ocean Drilling Program, Scientific Results, Vol.167, p.3-40. Publisher: Texas A & M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 0884-5891
Note: In English. 102 refs.CD-ROM format, ISSN 1096-2514; WWW format, ISSN 1096-7451; all chapters are also available on the included CD-ROM and on the Web in PDF format; illus., incl. 5 tables, sketch map
Summary: Selected calcareous nannofossils were investigated by means of quantitative and semiquantitative methods in middle Miocene to Pleistocene sediments from the California margin (Pacific Ocean) recovered during Ocean Drilling Program Leg 167. The goal of the work was to provide detailed dating and correlations of the successions recovered that span a wide latitudinal transect (from 29°N to 40°N) affected by strongly variable ecological conditions. The standard zonations are not easily applied in these sediments; hence, additional biohorizons have been adopted that are useful in the area. Specifically, the reliability of 50 biohorizons has been evaluated by considering their mode of occurrence, ranking, and spacing. For the Pleistocene interval, the following six biohorizons are considered reliable: last occurrence (LO) of Pseudoemiliania lacunosa, first occurrence (FO) of Gephyrocapsa sp. 3, LO and FO of large Gephyrocapsa, FO of Gephyrocapsa oceanica s.l., and LO of Reticulofenestra asanoi. The acme end (AE) of small Gephyrocapsa spp. and the LOs of Helicosphaera sellii and Calcidiscus macintyrei do not seem to be reliable in the study area. For the Pliocene interval, the following nine biohorizons are considered reliable: LO of Discoaster pentaradiatus, LO of Discoaster surculus, LO of Discoaster tamalis, LO and first common and continuous occurrence (FCO) of Discoaster asymmetricus, paracme beginning (PB) and paracme end (PE) of Discoaster pentaradiatus, LO of Reticulofenestra pseudoumbilicus, and LO of Amaurolithus delicatus. The LOs of Discoaster brouweri and Discoaster triradiatus and the FCO of P. lacunosa seem to be moderately reliable. For the late Miocene interval, the following eight biohorizons are considered reliable: LO of Discoaster quinqueramus, PB and PE of R. pseudoumbilicus, FO of Amaurolithus primus, FO and LO of Minylitha convallis, LO of Catinaster calyculus, and FO of Catinaster spp. Sediments of middle Miocene age were recovered only at low-latitude Site 1010. Therefore, the reliability of the six biohorizons identified (Discoaster kugleri FO and LO, Calcidiscus macintyrei FO, Cyclicargolithus floridanus last common and continuous occurrence [LCO], Calcidiscus premacintyrei LO, and Sphenolithus heteromorphus LO) cannot be fully evaluated. These events have been correlated with the global chronostratigraphic scale and calibrated to the geomagnetic polarity time scale. This integrated time frame has been used for dating the successions recovered during Leg 167. The biozones proposed for the Pleistocene seem to be valid globally, and they are proposed as an alternative to the standard zonation.
Year of Publication: 2000
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Biostratigraphy; Biozones; Calcareous composition; California; Cenozoic; Continental margin; Correlation; East Pacific; Floral list; Leg 167; Microfossils; Miocene; Nannofossils; Neogene; North Pacific; Northeast Pacific; Ocean Drilling Program; Pacific Ocean; Plantae; Pleistocene; Pliocene; Quaternary; Species diversity; Tertiary; United States; Upper Miocene
Coordinates: N280000 N420000 W1170000 W1280000
Record ID: 2000080017
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