Early to Mid-Cretaceous calcareous nannoplankton from the Northwest Pacific Ocean, Leg 198, Shatsky Rise

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doi: 10.2973/odp.proc.sr.198.103.2005
Author(s): Bown, Paul R.
Ocean Drilling Program, Leg 198, Shipboard Scientific Party, College Station, TX
Author Affiliation(s): Primary:
University College London, Department of Geological Sciences, London, United Kingdom
Other:
Universita di Milano, Italy
Ocean Drilling Program, United States
Pennsylvania State University, United States
Stanford University, United States
University College London, United Kingdom
Indiana University at Bloomington, United States
University of Florida, United States
University of Wales, United Kingdom
University of Michigan, United States
University of Queensland, Australia
Stockholm Universitet, Sweden
James Cook University of North Queensland, Australia
Tohoku University, Japan
University of Massachusetts at Amherst, United States
California State University, United States
Japan Marine Science and Technology Center, Japan
University of Oxford, United Kingdom
Universität Bremen, Federal Republic of Germany
Lamont-Doherty Earth Observatory, United States
University of California at Santa Cruz, United States
Volume Title: Proceedings of the Ocean Drilling Program; scientific results; extreme warmth in the Cretaceous and Paleogene; a depth transect on Shatsky Rise, Central Pacific; covering Leg 198 of the cruises of the drilling vessel JOIDES Resolution; Yokohama, Japan, to Honolulu, Hawaii; Sites 1207-1214; 27 August-23 October 2001
Volume Author(s): Bralower, Timothy J.; Premoli Silva, Isabella; Malone, Mitchell J.; Arthur, Michael A.; Averyt, Kristen B.; Bown, Paul R.; Brassell, Simon C.; Channell, James E. T.; Clarke, Leon J.; Dutton, Andrea; Eleson, Jason W.; Frank, Tracy D.; Gylesjo, Susanne; Hancock, Haidi J. L.; Kano, Harumasa; Leckie, R. Mark; Marsaglia, Kathleen M.; McGuire, Jennifer; Moe, K. T.; Petrizzo, Maria Rose; Robinson, Stuart A.; Röhl, Ursula; Sager, William W.; Takeda, Kotaro; Thomas, Deborah; Williams, Trevor; Zachos, James C.
Source: Proceedings of the Ocean Drilling Program; scientific results; extreme warmth in the Cretaceous and Paleogene; a depth transect on Shatsky Rise, Central Pacific; covering Leg 198 of the cruises of the drilling vessel JOIDES Resolution; Yokohama, Japan, to Honolulu, Hawaii; Sites 1207-1214; 27 August-23 October 2001, Timothy J. Bralower, Isabella Premoli Silva, Mitchell J. Malone, Michael A. Arthur, Kristen B. Averyt, Paul R. Bown, Simon C. Brassell, James E. T. Channell, Leon J. Clarke, Andrea Dutton, Jason W. Eleson, Tracy D. Frank, Susanne Gylesjo, Haidi J. L. Hancock, Harumasa Kano, R. Mark Leckie, Kathleen M. Marsaglia, Jennifer McGuire, K. T. Moe, Maria Rose Petrizzo, Stuart A. Robinson, Ursula Röhl, William W. Sager, Kotaro Takeda, Deborah Thomas, Trevor Williams and James C. Zachos; Ocean Drilling Program, Leg 198, Shipboard Scientific Party, College Station, TX. Proceedings of the Ocean Drilling Program, Scientific Results (CD ROM), Vol.198, 82p. Publisher: Texas A&M University, Ocean Drilling Program, College Station, TX, United States. ISSN: 1096-2514
Note: In English. Available only on CD-ROM in PDF format and on the Web in PDF or HTML; includes appendices. 106 refs.CD-ROM, ISSN 1096-2514; WWW, ISSN 1096-7451; illus., incl. 13 plates, 9 tables, sketch map
Summary: During Ocean Drilling Program Leg 198, Sites 1207, 1208, 1212, 1213, and 1214 were drilled on Shatsky Rise, coring Lower to mid-Cretaceous successions of nannofossil chalk, porcellanite, and chert. Although recovery was poor, these sites yielded an outstanding record of calcareous nannoplankton, providing valuable data concerning the evolutionary succession and paleobiogeography of the largest Cretaceous marine habitat. Mid-Cretaceous sections (Aptian-Cenomanian) were recovered at all sites, and Site 1213 includes an apparently complete Berriasian-Hauterivian section. Biostratigraphic dating is problematic in places because of the absence or rarity of zonal fossils of both Boreal and Tethyan affinity. The majority of nannofossil assemblages are relatively typical of this age, but there are clear differences that set them apart from coeval epicontinental assemblages: for example, Lithraphidites carniolensis is common to abundant throughout and was most likely an oceanic-adapted taxon; the cold- to temperate-water species Crucibiscutum salebrosum, Repagulum parvidentatum, and Seribiscutum primitivum are entirely absent, indicating the persistence of tropical, warm surface water temperatures; and the warm-water species Hayesites irregularis is common. Most striking, however, is the virtual absence of Nannoconus and Micrantholithus, both taxa that were conspicuous and often common components of many Tethyan and Atlantic nannofloras. These forms were almost certainly neritic adapted and usually absent in deep open-ocean settings away from guyots and platforms. Other Tethyan taxa are also absent or rare and sporadically distributed (e.g., Calcicalathina oblongata, Conusphaera spp., Tubodiscus verenae, and Lithraphidites bollii), and factors related to neritic environments presumably controlled their distribution. Site 1213 also records extended Early Cretaceous ranges for species previously thought to have become extinct during the Late Jurassic (e.g., Axopodorhabdus cylindratus, Hexapodorhabdus cuvillieri, and Biscutum dorsetensis), suggesting these species became Pacific-restricted prior to their extinction. Watznaueria britannica may also have been a species with Pacific affinities before reexpansion of its biogeography in the early Aptian. One new genus (Mattiolia) and thirteen new species (Zeugrhabdotus clarus, Zeugrhabdotus petrizzoae, Helicolithus leckiei, Rhagodiscus amplus, Rhagodiscus robustus, Rhagodiscus sageri, Rhagodiscus adinfinitus, Tubodiscus bellii, Tubodiscus frankiae, Gartnerago ponticula, Haqius peltatus, Mattiolia furva, and Kokia stellata) are described from the Shatsky Rise Lower Cretaceous section.
Year of Publication: 2006
Research Program: ODP Ocean Drilling Program
Key Words: 12 Stratigraphy, Historical Geology and Paleoecology; Algae; Biostratigraphy; Calcareous composition; Chronostratigraphy; Correlation; Cretaceous; Leg 198; Lower Cretaceous; Mesozoic; Microfossils; Middle Cretaceous; Nannofossils; New taxa; North Pacific; Northwest Pacific; Ocean Drilling Program; Pacific Ocean; Paleoenvironment; Plantae; Shatsky Rise; Species diversity; Taxonomy; West Pacific
Coordinates: N313400 N374800 E1624600 E1571500
Record ID: 2006077744
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