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= A new low-latitude late Paleocene-early Eoceneradiolarian biozonation based on unitaryassociations:applications for accreted terranes.( 英 文 ). Jackett S -J; Baumgartner P O; BandiniA N. Stratigraphy, 2008, 5(1): 39-62The late Paleocene – early Eocene sequencesof DSDP Leg 10 Sites 86, 94, 95, and 96, Leg 43Site 384 andODP Leg 171B Hole 1051A havebeen re-sampled and re-examined for radiolarians.A new late Paleocene to early Eocenelowlatituderadiolarian zonation suited for the correlationof accreted terranes is established by usingthe Unitary Association(UA) method. Thismethod has the property of attributing equalweight to each species occurrence, which hastheadvantage of not being dependant on a limitedset of key datums. Twenty-two UAs havebeen erected and correlated to theexisting agemodels (given by nannofossils, planktonic foraminiferaand radiolarians) for each site. The 22UAs have beenunited into seven Unitary AssociationsZones (UA Zones) (JP10- JE4) to increaselateral traceability. Herein we presenttheresulting composite range chart and correlationbetween the studied cores.The position ofthe UA Zones in the Paleogene timescale ofBerggren et al. (1995) have been estimated usinga generalconsensus correlation with calcareousmicrofossil groups and the existing radiolarianzonation. Reproducible radiolarianevents identified in the present work are bound to directly tiedand compiled absolute ages given by Nigrini etal. (2006)and Sanfi lippo and Nigrini (1998a).The RP zones (Sanfi lippo and Nigrini 1998a)and the UA Zones are consistent. UnitaryAssociationspermit to distinguish supplementaryzonal subdivisions within RP7 andRP6.Topotypes from DSDP Leg 10 have beenillustrated using mainly SEM imaging to facilitatethe identifi cation of re-crystallized forms.2008040326日 本 西 南 部 坦 巴 地 体 生 野 地 区 Wakai 堆 积 杂岩 黑 色 燧 石 中 下 侏 罗 统 ( 赫 塘 阶 - 辛 涅 缪 尔阶 ) 放 射 虫 组 合 = Lower Jurassic (Hettangian-Sinemurian) radiolarian assemblages from blackcherts in the Wakai accretionary complex, Ikunoarea,Tamba Terrane, Southwest Japan. ( 英 文 ).Shibutani S; Hori R S. Stratigraphy, 2008, 5(1):83-98Well-preserved Lower Jurassic (Hettangian-Sinemurian) radiolarian fossils were obtainedfrom black chertand shale of the Wakai complexin the Ikuno area, Tamba Terrane, SouthwestJapan. These faunas are dominated by the generaNatoba, Canoptum, Ovumella, and Droltus. Wedefi ne a Natoba-rich Assemblage as one containing>10% Natoba in the nassellarian assemblage.This assemblage is also characterized byrelatively high abundance of Canoptum andOvumella (combined abundance >15% nassellarianassemblage) and a low nassellarian/spumellarianratio (