georefid:1981-027026georefid:1981-026994SEDIS 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/dsdp.proc.55.132.1980<gco:CharacterString>The claystone layer between two basalt flows in Hole 432A; an argument for the emergence of Nintoku Seamount</gco:CharacterString>1980-01-01publicationgeorefid:1981-027026doi:10.2973/dsdp.proc.55.132.1980Karpoff, Anne MarieInst. Geol., Strasbourg, FranceauthorTexas A & M University, Ocean Drilling Program, College Station, TX, United StatespublisherdocumentDigitalIn: Shambach, James (editor), Jackson, Everett Dale, Koizumi, Itaru, Avdeiko, Gennady, Butt, Arif, Clague, David, Dalrymple, G. Brent, Greene, H. Gary, Karpoff, Anne Marie, Kirkpatrick, R. James, Kono, Masaru, Hsin Yi Ling, McKenzie, Judith, Morgan, Jason, Takayama, Toshiaki, Initial reports of the Deep Sea Drilling Project covering Leg 55 of the cruises of the drilling vessel Glomar Challenger, Honolulu, Hawaii to Yokohama, Japan; July-September 197755707-711The red claystone interlayered between basalt flows of Hole 432A is a subaerial formation. From its structure and mineralogical and geochemical composition, it is concluded that the claystone was formed by weathering of a basaltic tuffaceous ash under subtropical conditions and afterwards underwent a low-thermal transformation when the upper basalt flow settled. This agrees with the hypothesis that the Emperor seamounts, and in particular the Nintoku Seamount, were emergent during the period of their formation and of successive deposition of basalt flows.completedOceanographybasaltsclastic rocksclaystoneDeep Sea Drilling ProjectEmperor Seamountsgenesisigneous rocksIPODLeg 55North PacificNorthwest Pacificocean floorsoceanographyPacific Oceanseamountssedimentary petrologysedimentary rocksSite 432stratigraphyvolcanic rocksWest Pacificurn:org.iodp:exp:55urnlargerWorkCitationcampaignurn:org.iodp:exp:55:site:432urnlargerWorkCitationstudyurn:org.iodp:exp:55urnlargerWorkCitationcampaignEnglishgeoscientificInformation160.0000175.000035.000050.0000application/pdfunknownSEDIS Publication Catalogueana.macario@awi.dehttp://sedis.iodp.org/pub-catalogue/informationpointOfContacthttp://deepseadrilling.org/55/volume/dsdp55_32.pdfdownload