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of centrifuging in heavy liquid, treatment withnitric acid to remove pyrite, and the loss of materialthrough a 7 pin sieve during washing of asample. The centrifuge test showed that the relativeproportions of different genera stabilizedafter three heavy liquid separations and thenumber of acritarchs extracted fell consistentlyby about 35% at each separation. Treatment withnitric acid yielded a slightly lower number ofacritarchs per gram of sediment. but it appears tohave yielded more herkomorph and sphaeromorphacritarchs. Treating samples with nitricacid renders them more comparable with thosenot containing pyrite. The loss of specimenswhilst washing through a 7 mum sieve proved tobe minimal. It was concluded that three heavyliquid separations should routinely be carried out,in Conjunction with treatment with nitric acidand regular tests to examine material passingthrough a 7 mum sieve.疑 源 类2008040071俄 罗 斯 Ust-Yenisei 地 区 上 白 垩 统 沉 积 的 生 物相 分 析 : 孢 型 体 的 意 义 = Biofacies analysis ofUpper Cretaceous deposits in the Ust-Yeniseiregion: Implications of palynomorphs. ( 英 文 ).Lebedeva N K. Stratigraphy and GeologicalCorrelation, 2008, 16(2): 182-197The results of palynomorph biofacies analysisin the Upper Cretaceous deposits of the Ust-Yenisei region are presented. The establishedfacies confinement and indicative features ofseparate palynomorph groups are used, alongwith identified dinocyst morphotypes and taxa,in paleogeographic reconstructions. Seven palynomorphassociations characterizing continental,coastal-marine, shallow-and deep-water faciesare distinguished based on quantitative proportionsbetween morphological groupings and individualtaxa. As boundaries between distinguishablebiostratigraphic and facies subdivisionsdo not coincide, dinocysts were likely insignificantlydependent in distribution on faciesin the West Siberian epicontinental basin at least.On the other hand, distribution trends of particulardinocyst morphotypes and other microphytofossilsare correlative with transgressiveregressivecycles and can be used for reconstructionof paleoenvironments.牙 形 石2008040072美 国 东 部 阿 巴 拉 契 亚 盆 地 南 部 中 、 上 泥 盆 统Chattanooga 页 岩 牙 形 石 生 物 地 层 = Conodontbiostratigraphy of the Chattanooga shale,Middle and Upper Devonian, southern AppalachianBasin, eastern United States. ( 英 文 ). OverD J. Journal of Paleontology, 2007, 81(6): 1194-1217 8 图 版 .The Chattanooga Shale of the southern AppalachianBasin contains a diverse conodont faunaof the high Givetian, Frasnian, and Famennian.The predominantly fine-grained strata were depositedin an offshore setting where depositionalpackages are separated by unconformities.Conodonts allow regional and global correlationof these strata, recognition of the Frasnian-Famennian boundary, and narrow biostratigraphicconstraint of two Frasnian ash beds, MNZone 8 for the Belpre Ash and upper MN Zone13 for the Center Hill Ash. Three new Frasnianpalmatolepid conodonts are described in opennomenclature, and the holotype of Palmatolepisregularis Cooper is reillustrated.2008040073伊 朗 东 部 首 次 发 现 二 叠 纪 牙 形 类 化 石 以 及 再一 次 出 现 在 特 提 斯 区 的 二 叠 纪 剖 面 瓜 德 鲁 普统 的 底 部 = First finds of Permian conodonts ineastern Iran and once again on the Guadalupianseries base in Permian sections of the Tethyanrealm. ( 英 文 ). Leven E Ja; Reimers A N; KozurH W. Stratigraphy and Geological Correlation,2007, 15(1): 57-66Conodonts found for the first time in easternIran (the Bage-Vang section) are characterized.Beds with conodonts also yield fusulinids that issuitable for refining correlation of conodont andfusulinid zonations. Stratigraphic ranges of differentconodont species in the Bage-Vang sectionare correlated with those in the Luodian section(South China), where conodonts are alsoaccompanied by fusulinids. As a result, someprevious inferences concerning position of theGuadalupian Series base in the Tethyan sectionsare refined.2008040074加 拿 大 不 列 颠 哥 伦 比 亚 北 部 Cassiar 地 体 下至 上 奥 陶 统 Kechika 组 和 Road River 群 牙 形类 = Conodonts from the Kechika Formationand Road River Group (Lower to Upper Ordovician)of the Cassiar Terrane, northern BritishColumbia. ( 英 文 ). Pyle L J; Barnes C R. CanadianJournal of Earth Sciences, 2001, 38(10):1387-1401This study examines the lower Paleozoicstratigraphy of the Cassiar Terrane from threekey sections comprising an east-west transectacross the terrane. The Cassiar Terrane, west ofthe Northern Rocky Mountain Trench, consistsof a Neoproterozoic to Triassic succession and isa fragment of the Cordilleran Miogeocline thathas been displaced northward. The amount ofdisplacement from its original position remainscontroversial. Conodonts from the Cassiar Ter-23