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Now showing items 1-20 of 25
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(2001)Revising Frasnian radiolarians, we established three new radiolarian zones within this stage. These are the Helenifore gogoense-Retisphaera concinna Zone of the lower Frasnian, Moskovistella allbororum-Ceratoikiscum ukhtensis ...
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(2002)Carbon isotope records for inorganic and total organic carbon (TOC) as well as for individual organic biomarkers show two positive excursions in the Late Frasnian with comparable shape and amplitude in δ13C. The positive ...
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(2001)The task of this paper is to discuss the Frasnian Stratigraphy of the central region of the Russian Platform; to analyse the distribution of the most abundantly occurring platform conodonts: to revise the zonal schemes ...
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(2004)Upper Devonian clastic complexes (the Zilair Formation flysch, Biyagoda mixtite, Koltuban limestone conglomerate, Bugodak volcanogenic-sedimentary sequence) are considered. In the eastern flank of the Southern Urals, the ...
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(2001)The first records of Frasnian Rugosa from Mongolia are discussed, including Nicholsoniella golovtshenkoae sp. nov., N. hurenensis sp. nov., Aulacophyllum exiguum sp. nov. and Temnophyllum ruzhentsevi sp. nov.
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(2006)Neodymium isotope data obtained from conodonts collected in Morocco and Poland attest a geochemical decoupling of seawater in the Variscan realm during the Late Devonian. The water masses on the shelves were characterized ...
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(2004)A model of the global biogeochemical cycles coupled to a energy-balance climate model (the COMBINE model) is used to identify the causes of two large δ13C value excursions across the Frasnian-Famennian (F-F) boundary. We ...
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(2001)The temporal link between mass extinctions and large igneous provinces is well known. Here, we examine this link by focusing on the potential climatic effects of large igneous province eruptions during several extinction ...
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(2000)Palynomorph distribution in Euramerica and western Gondwana, from the Latest Givetian to the Latest Famennian, may be explained, to some extent, by climatic changes. Detailed miospore stratigraphy dates accurately the ...
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(1999)Review of sea-level changes during the big five mass extinctions and several lesser extinction events reveals that the majority coincide with large eustatic inflexions. The degree of certainty with which these eustatic ...
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(2000)The paleolandscape schemes for the Eifelian, Givetian and Frasnian seas of Siberia are considered for the first time in the present work. On the basis of sediment lithology, composition of benthic communities, their habitat ...
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(1998)The composition of the genus Palmatolepis from the lower member of the Domanik Formation in Southern Timan essentially differs from conodont assemblages of synchronous units (the Middle + Upper asymmetrica zones) in other ...
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(2001)Abstract-The Frasnian conodont assemblages from the Ust'-Yarega and Kraipol formations of the Middle Timan are discussed. Seven new species of the genus Polygnathus are described: P. illustris, P. land, P. pizhmensis, P. ...
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(2006)The study aims to put constraints on global environmental changes, which took place during the Frasnian-Famennian (F/F) transition by using a geochemical multiproxy approach. For this several key European F/F boundary ...
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(2002)A newly compiled global reef database indicates that the 5–6 Myr long Frasnian (Late Devonian) metazoan reef episode had relatively low diversity compared to Middle Devonian highs (with over 200 genera of calcitic rugose ...
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(2001)The interior of Liorhynchiis taimyricns is studied. Consideration of its internal and external features suggests its assignment to the genus Caiyorhynchus Crickmay, 1952. A new subspecies Lateralatlmstrum atliabascensis ...
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(2004)Spiriferid brachiopods of the family Uchtospiriferidae are revised based on the restudy of the original material from the memorial collection of A.I. Ljaschenko. The fact that the changes in the shell micro-ornamentation ...
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(2004)Detailed biostratigraphic correlation of the late Frasnian and Famennian sectoins in the South Urals shows that the key global scale events near the boundary of Frasnian and Famennian are clearlyxpressed in combination ...
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(1999)The prime causation of the mid-Late Devonian mass extinction near the Frasnian-Famennian (F-F) boundary remains uncertain. Nevertheless, geochemical evidence has been presented recently as decisive evidence of a giant ...
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(2004)On the western slope of the Southern Urals, a continuous conodont zone sequence within different facies of the Frasnian-Famennian (F-F) boundary beds is documented. In all the sections the boundary between both stages runs ...
Now showing items 1-20 of 25