georefid:2007-002119georefid:2007-002115SEDIS 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.200.007.2006<gco:CharacterString>Cenozoic radiolarian biostratigraphy of Hole 1223A in the North Pacific; ODP Leg 200</gco:CharacterString>2006-01-01publicationgeorefid:2007-002119doi:10.2973/odp.proc.sr.200.007.2006Popova-Goll, Irina M.Texas A&M University, Integrated Ocean Drilling Program, College Station, TX, United StatesauthorGoll, Robert M.Woods Hole Oceanographic Institution, United StatesauthorTexas A&M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Kasahara, Junzo, Stephen, Ralph A., Acton, Gary D., Calhoun, R. Scott, Haraguchi, Satoru, Hoskins, Hartley, Kittredge, Steven, Lustrino, Michele, Manz, Werner, Nakamura, Mikako, Natland, James H., Nielsen, Ingun, Paul, Heather, Schumann-Kindel, Gabriela, Sherman, Sarah, Sun, Yue-Feng, Wilson, John, Proceedings of the Ocean Drilling Program; scientific results; drilling at the Hawaii-2 Observatory (H2O) and the Nuuanu Landslide; covering Leg 200 of the cruises of the drilling vessel JOIDES Resolution; Honolulu, Hawaii, to San Diego, California; Sites 1223 and 1224; 16 December 2001-27 January 2002200Among the groups of oceanic microfossils, only Radiolaria occur in abundances and preservation states sufficient to provide biostratigraphic control for restricted intervals within sediments recovered in Hole 1223A. The distribution of these microfossils has been divided into four major intervals, A-D. Radiolaria distribution Interval A occupies the depth range 0-3.0 meters below seafloor (mbsf), where the abundance of specimens is very low and preservation is poor. Radiolaria distribution Interval B occupies the depth range 3.02-7.1 mbsf. Radiolaria in Interval B are locally rare to abundant and well preserved, and assemblages range in age from pure early Eocene to early Eocene admixed with late Neogene taxa. Radiolaria distribution Interval C occupies the depth range 7.1-36.99 mbsf and is characterized by sediments either barren of microfossils or containing extremely rare early Eocene specimens. Radiolaria distribution Interval D occupies the depth range 36.99-38.7 mbsf (base of the recovered sedimentary section), where early Eocene Radiolaria are present in rare to common frequencies, but opal-A to opal-CT recrystallization has degraded the preservation state. The late Neogene assemblage of Radiolaria distribution Interval B is dated at 1.55-2.0 Ma, based on occurrences of Eucyrtidium matuyamai, Lamprocyclas heteroporos, and Theocorythium trachelium trachelium. The early Eocene assemblage of Radiolaria distribution Intervals B and D is somewhat problematically assigned to the Buryella clinata Zone.completedStratigraphybiostratigraphybiozonesCenozoicdepositional environmentEast PacificEoceneInvertebrataLeg 200lithostratigraphymicrofossilsNeogeneNorth PacificNortheast PacificOcean Drilling Programocean floorsODP Site 1223Pacific OceanPaleogenepaleomagnetismProtistaRadiolariaTertiarythicknessurn:org.iodp:exp:200urnlargerWorkCitationcampaignurn:org.iodp:exp:200:site:1223urnlargerWorkCitationstudyurn:org.iodp:exp:200urnlargerWorkCitationcampaignEnglishgeoscientificInformation-155.3900-155.390022.580022.5800Available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendixapplication/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://www-odp.tamu.edu/publications/200_SR/VOLUME/CHAPTERS/007.PDFdownload