Popova-Goll, Irina M.; Goll, Robert M. (2006): Cenozoic radiolarian biostratigraphy of Hole 1223A in the North Pacific; ODP Leg 200. Texas A&M University, Ocean Drilling Program, College Station, TX, United States, In: 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 2002, 200, georefid:2007-002119

Abstract:
Among 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.
Coverage:
West: -155.3900 East: -155.3900 North: 22.5800 South: 22.5800
Relations:
Expedition: 200
Site: 200-1223
Supplemental Information:
Available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendix
Data access:
Provider: SEDIS Publication Catalogue
Data set link: http://sedis.iodp.org/pub-catalogue/index.php?id=10.2973/odp.proc.sr.200.007.2006 (c.f. for more detailed metadata)
Data download: application/pdf
This metadata in ISO19139 XML format