georefid:2007-088086georefid:2007-088081SEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.149.209.1996<gco:CharacterString>Pliocene-Pleistocene calcareous nannofossils from the Iberia abyssal plain</gco:CharacterString>1996-01-01publicationgeorefid:2007-088086doi:10.2973/odp.proc.sr.149.209.1996Liu, LiFlorida State University, Department of Geology, Tallahassee, FL, United StatesauthorMaiorano, P.Rice University, United StatesauthorZhao, XixiOcean Drilling Program, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Whitmarsh, Robert B., Sawyer, Dale S., Klaus, Adam, Beslier, Marie-Odile, Collins, Eric S., Comas, Maria Carmen, Cornen, Guy, de Kaenel, Eric, Pinheiro, Luis de Menezes, Gervais, Elisabeth, Gibson, Ian L., Harry, Dennis L., Hobart, Michael A., Kanamatsu, Toshiya, Krawcyzk, Charlotte M., Liu, Li, Lofts, Jeremy C., Marsaglia, Kathleen M., Meyers, Philip A., Milkert, Doris, Milliken, Kitty L., Morgan, Julia K., Ramirez, Pedro, Seifert, Karl E., Shaw, Timothy J., Wilson, Chris, Yin, Chuan, Zhao, Xixi, Proceedings of the Ocean Drilling Program; scientific results, Iberia abyssal plain; covering Leg 149 of the cruises of the Drilling Vessel JOIDES Resolution; Balboa Harbor, Panama, to Lisbon, Portugal; sites 897-901, 10 March-25 May 1993149147-164During Ocean Drilling Program Leg 149, five sites were drilled on the Iberia Abyssal Plain, west of the Iberian Peninsula. Five holes (Holes 897A, 897C, 898A, 899A, and 900A) yielded Pliocene-Pleistocene sediments, which consist mainly of turbidites. Among these, Holes 897C and 898A yielded significant Pliocene-Pleistocene sediments that provided a high-resolution nannofossil biostratigraphy essential for locating paleomagnetic polarity events and for interpreting the age and frequency of turbidite sedimentation in the Iberia Abyssal Plain. Pliocene-Pleistocene nannofossils recovered during Leg 149 are generally abundant and well to moderately preserved. Although reworking is evident in most samples, the Pliocene-Pleistocene nannofossils proved quite reliable for dating the sediments. Most Pleistocene zonal boundaries proposed by S. Gartner in 1977 and the Pliocene standard zonal boundaries proposed by E. Martini in 1971 were easily recognized. In addition, several other nannofossil events proposed by D. Rio et al. in 1990 and by T. Sato and T. Takayama in 1992 were recognized and proved valuable for improving the resolution of Pliocene-Pleistocene nannofossil biostratigraphy. The Pliocene-Pleistocene nannofossil biostratigraphic results of Holes 897C and 900A coincide rather well with the discerned paleomagnetic polarity events. As a result, the combination of nannofossil biostratigraphic and paleomagnetic studies provides important information for fulfilling the second objective of this leg: to determine the history of turbidite sedimentation in the Iberia Abyssal Plain. The general trend of sedimentation rates inferred by nannofossil biostratigraphy indicates that sedimentation rates increase from the continental margin to the deep sea along with increasing water depth.completedStratigraphyPaleobotanyabyssal plainsalgaeassemblagesAtlantic OceanbiostratigraphybiozonesCenozoicEuropeIberian abyssal plainIberian PeninsulaLeg 149lithofaciesnannofossilsNeogeneNorth AtlanticNortheast AtlanticOcean Drilling Programocean floorsODP Site 897ODP Site 898ODP Site 899ODP Site 900PlantaePleistocenePlioceneQuaternarySouthern EuropeTertiaryurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:897urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:898urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:899urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignurn:org.iodp:exp:149:site:900urnlargerWorkCitationstudyurn:org.iodp:exp:149urnlargerWorkCitationcampaignEnglishgeoscientificInformation-12.2847-11.361640.405940.5019application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/149_SR/VOLUME/CHAPTERS/SR149_05.PDFdownload