georefid:2005-041663georefid:2005-041660SEDIS Publication Catalogue

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http://sedis.iodp.org/pub-catalogue/informationpointOfContact2011-06-23T00:00:00Zhttp://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.182.005.20032004-01-01publicationgeorefid:2005-041663doi:10.2973/odp.proc.sr.182.005.2003Li, QianyuUniversity of Adelaide, Department of Geology and Geophysics, Adelaide, South. Aust., AustraliaauthorMcGowran, BrianAustralian Geological Survey Organisation, AustraliaauthorBrunner, Charlotte A.Texas A&M University, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Hine, Albert C., Feary, David A., Malone, Mitchell J., Andres, Miriam, Betzler, Christian, Brooks, Gregg R., Brunner, Charlotte A., Fuller, Michael, Molina Garza, Roberto S., Holbourn, Ann E., Huuse, Mads, Isern, Alexandra R., James, Noel P., Ladner, Bryan C., Li, Qianyu, Machiyama, Hideaki, Mallinson, David J., Matsuda, Hiroki, Mitterer, Richard M., Robin, Cecile, Russell, Joellen L., Shafik, Samir, Simo, J. A., Smart, Peter L., Spence, Guy H., Surlyk, Finn C., Swart, Peter K., Wortmann, Ulrich G., Proceedings of the Ocean Drilling Program; scientific results; Great Australian Bight; Cenozoic cool-water carbonates; covering Leg 182 of the cruises of the drilling vessel JOIDES Resolution; Wellington, New Zealand, to Fremantle, Australia; Sites 1126-1134, 8 October-7 December 1998182Planktonic foraminifers from Ocean Drilling Program Leg 182, Holes 1126B and 1126C, 1128B and 1128C, 1130A and 1130B, 1132B, and 1134A and 1134B confirm the neritic record that during the early Miocene the Great Australian Bight region was in a cool-temperate regime with abundant Globoturborotalita woodi. Warm marine environments started to develop in the later part of the early Miocene, and the region became warm temperate to subtropical in the early middle Miocene with abundant Globigerinoides, Orbulina, and Globorotalia, corresponding to global warming at the Miocene climatic optimum. Fluctuations between cool- and warm-temperate conditions prevailed during the late Miocene, as indicated by abundant Globoconella conoidea and Menardella spp. A major change in planktonic foraminiferal assemblages close to the Miocene/Pliocene boundary not only drove many Miocene species into extinction but also brought about such new species as Globorotalia crassaformis and Globoconella puncticulata. Warm-temperate environments continued into the early and mid-Pliocene before being replaced by cooler conditions, supporting numerous Globoconella inflata and Globigerina quinqueloba. Based on data from this study and published results from the Australia-New Zealand region, we established a local planktonic foraminifer zonation scheme for separating the southern Australian Neogene (SAN) into Zones SAN1 to SAN19 characterizing the Miocene and Zones SAN20 to SAN25 characterizing the Pliocene. The Neogene sections from the Great Australian Bight are bounded by hiatuses of approximately 0.5 to >3 m.y. in duration, although poor core recovery in some holes obscured a proper biostratigraphic resolution. A total of 15 hiatuses, numbered 1 to 15, were identified as synchronous events from the base of the Miocene to the lower part of the Pleistocene. We believe that these are local manifestations of major third-order boundaries at about (1) 23.8, (2) 22.3, (3) 20.5, (4) 18.7, (5) 16.4, (6) 14.8, (7) 13.5, (8) 11.5, (9) 9.3, (10) 7.0, (11) 6.0, (12) 4.5, (13) 3.5, (14) 2.5, and (15) 1.5 Ma, respectively. This hiatus-bounded Neogene succession samples regional transgressions and stages of southern Australia and reveals its stepwise evolutionary history.completedStratigraphyAustralasiaAustraliabiostratigraphyCenozoiccoresForaminiferaGreat Australian BightIndian OceanInvertebrataLeg 182microfossilsNeogeneOcean Drilling Programocean floorsODP Site 1126ODP Site 1128ODP Site 1130ODP Site 1132ODP Site 1134paleo-oceanographypaleoenvironmentpaleotemperatureplanktonic taxaProtistaTertiaryurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1126urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1128urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1130urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1132urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignurn:org.iodp:exp:182:site:1134urnlargerWorkCitationstudyurn:org.iodp:exp:182urnlargerWorkCitationcampaignEnglishgeoscientificInformation127.1500128.5500-34.2330-33.1720Available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendixapplication/pdfunknownSEDIS Publication Catalogue

ana.macario@awi.de

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