紫色土系统分类研究     

唐时嘉  徐建忠  张建辉  罗有芳 《山地学报》1996,(Z1)

以参考文献[1]为指南,研究和鉴比了川鄂湘赣浙滇等省约70个紫色土剖面的属性特征,进行了紫色土系统分类和从土纲至亚类的连续命名.结果是,它们分别归属新成土纲中的紫色正常新成土和雏形土纲中的紫色湿润雏形土等2个土类、9个亚类.最后就土纲、亚纲、土类、亚类进行了检索.  相似文献   

A new Mississippian dasyclad alga (Chlorophyta) from SW Spain: Implications for the reproductive evolution of the dasyclads during the Late Palaeozoic     

Pedro Cózar  Daniel Vachard 《Eclogae Geologicae Helvetiae》2004,97(2):175-181

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1999年9月21日台湾集集地震的震源参数综合判定     

陈祥熊 《福建地震》2005,(4)

本文利用半经验、半理论的方法对世界各主要地震汇集和研究机构所给出的集集主震基本震源参数进行了综合计算和评定。根据这些参数重新计算了集集主震的标量地震矩、破裂面积、应力降等。根据这些参数之间的内在联系,从地震分类学的角度,判定集集地震是发生于板块边缘的大地震。可供研究台湾岛上地震活动性以及台湾地区板块构造演化问题参考。  相似文献   

DMSP and DMS in the Northwest Atlantic: Late-summer distributions,production rates and sea-air fluxes     

Michael G. Scarratt  Maurice Levasseur  Sonia Michaud  Sylvie Roy 《Aquatic Sciences - Research Across Boundaries》2007,69(3):292-304

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Lake Tahoe vs. Lake Kinneret phytoplankton: comparison of long-term taxonomic size structure consistency     

Yury Kamenir  Monika Winder  Zvy Dubinsky  Tamar Zohary  Geoff Schladow 《Aquatic Sciences - Research Across Boundaries》2008,70(2):195-203

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Cyclocrinus, an enigmatic Jurassic–Cretaceous crinoid     

Hans Hess 《Swiss Journal of Geoscience》2008,101(2):465-481

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Anisian ammonoids from Qingyan, southwestern China: biostratigraphical implications for the age of the Qingyan Formation     

Frank Stiller  Hugo Bucher 《Swiss Journal of Geoscience》2008,101(2):547-562

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Material referred to Megalosaurus (Dinosauria: Theropoda) from the Middle Jurassic of Stonesfield, Oxfordshire, England: one taxon or two?     

Julia J. Day 《Proceedings of the Geologists' Association. Geologists' Association》2004,115(4):359-366

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New Cretaceous Scoliidae (Vespida=Hymenoptera) from the Lower Cretaceous of Spain and Brazil     

A. P. Rasnitsyn  X. Martínez-Delcls 《Cretaceous Research》1999,20(6):767

A new genus, Cretaproscolia, and three new species of scoliid wasps, Archaeoscolia hispanica, Cretoscolia montsecana and Cretaproscolia josai, are described from the Lower Cretaceous of Spain and Brazil. The species representing the new genus is attributed to the plesiomorphic extant subfamily Proscoliinae, while the two other new species are assigned to two previously described genera in the extinct, archaic subfamily Archaeoscoliinae. The Brazilian species is the first Mesozoic scoliidid to have been described from the New World.  相似文献   

Aeschnidiid nymphs from the Jehol biota (latest Jurassic–Early Cretaceous), China, with a discussion of the family Aeschnidiidae (Insecta, Odonata)     

Junfeng Zhang 《Cretaceous Research》1999,20(6):813

Undoubted fossil nymphs of the family Aeschnidiidae within the Aeschnidioidea of the Anisoptera, Odonata are identified and described and their phylogenetic relationship and bioecological characteristics are deduced. The nymphs discovered previously in China, Mongolia and Russia and considered to be aeschnidiids are, in fact, unrelated to this group. All nine Chinese species in six genera can be merged into one alone, Aeschnidium heishankowense. It is the first animal from the ‘Jehol biota’ of East Asia to be linked with the species known from the Lower Tithonian of Germany. The geological age of the oldest strata bearing the fossil nymphs is debatable; it could be latest Jurassic rather than Early Cretaceous.  相似文献