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Linking land and sea： Towards global reconstructions of the Jurassic world

Episodes 2008年第4期31卷 420-422页

作者： nicol morton Le Chardon Quartier Brugere 07200 Vogtie France

The Jurassic is traditionally famous for shallow marine sediments that are often very fossiliferous, notably in Europe, where the standard chronostratigraphic subdivisions were established and defined. However, widespread marginal and non-marine Jurassic sediments are also known, and are of great importance for the wellpreserved terrestrial biotas they contain, as well as for their hydrocarbon and coal reserves. IGCP Project 506 is directed towards finding means of correlation between marine and non-marine Jurassic rocks, as a foundation for a better understanding of the evolution of the Earth during the Jurassic Period.

关键词：侏罗纪陆地海洋整体重建

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The Global Boundary Stratotype Section and Point （GSSP） for the base of the Pliensbachian Stage （Lower Jurassic）, Wine Haven, Yorkshire, UK

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Episodes 2006年第2期29卷 93-106页

作者： Christian Meister Martin Aberhan Joachim Blau Jean-Louis Dommergues Susanne Feist-Burkhardt Ernie A. Hailwood Malcom Hart Stephen P. Hesselbos Mark W. Hounslow Mark Hylton nicol morton Kevin Page Greg D. Price Département de Géologie et de Paléontologie 1 route de Malagnou c.p. 6434 CH-1211 Genève 6 Switzerland Museum der Naturkunde Zentralinstitut der Humboldt-Universitat zu Berlin Institut für Palaiontolgie Invalidenstr. 43 D-10115 Berlin Germany Institut für Geowissenschaften Diezstrasse 15 D-35390 Giessen Germany Centre des Sciences de la Terre de I＇Université de Bourgogne UMR CNRS 5561： Paléontologie analytique et Géologie sédimentaire 6 Boulevard Gabriel F-21100 Dijon. France Department of Palaeontology The Natural History Museum Cromwell Road London SW7 5BD UK Core Magnetics The Green Sedbergh Cumbria LA10 5JS UK Department of Geological Sciences University of Plymouth Drake Circus Plymouth Devon PL4 8AA UK Department of Earth Sciences University of Oxford Parks Road Oxford OXI 3PR UK CEMP Geography Dept. Lancaster Environment Centre Lancaster University Bailrigg Lancaster UK. LA1 4YB Le Chardon Quarrier Brugière F-07200 Vogüé France

Following votes by the Pliensbachian Working Group, the Jurassic Subcommission and the International Commission on Stratigraphy, lUGS ratified the proposed Global Boundary Stratotype Section and Point （GSSP） for the base of the Pliensbachian Stage （Lower Jurassic） at the base of bed 73b in the Wine Haven section, Robin Hood＇s Bay, Yorkshire Coast, UK. This level contains the characteristic ammonite association Bifericeras donovani Dommergues and Meister and Apoderoceras sp. Complementary data include： a） Strontium-isotope stratigraphy, based on analysis of belemnites which yield a calcite 87Sr/^86Sr ratio for the boundary level of 0. 707425 and data supporting interpretation of continuous sedimentation; b） Belemnite oxygen-isotope data indicate a significant temperature drop （-5 ℃） across the boundary at this locality; c） A Transgressive Systems Tract （TST） initiated in the Aplanaturn Subzone （uppermost Sinemurian） continues into the Lowermost Pliensbachian （Taylori Subzone）; it forms part of a transgressive facies cycle sensu Graciansky et al. （1998）; d） The Upper Sinemurian to lowermost Plensbachian at Wine Haven section has a predominantly norreal magnetic polarity, but two discrete reversed polarity magnetozones are present. The first spans much of the latest Sinemurian Aplanatum Subzone. It terminates 〈0.5m below the Sinemurian-Pliensbachian boundary and may prove a valuable chronostratigraphic marker The second extends from the latest Oxynotum Subzone probably through to the lower part of the Raricostatum Subzone.

关键词：普连斯巴奇阶侏罗纪 GSSP 全球界线层型剖面点

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DEPOSITIONAL SEQUENCES AROUND J/K BOUNDARY IN THE QOMOLONGMA AREA, SOUTH TIBET

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地学前缘 2000年第S1期7卷 21-22页

作者： Shi Xiaoying 1, nicol morton 2(1 China University of Geosciences, Beijing 100083,China 2.University of London, London WC1E 7HX,UK)

The uppermost Jurassic to Lower Cretaceous in the Qomolongma (Mt. Everest) area were deposited in a strong subsiding setting on passive continental margin. From Tithonian to Valanginian, the area experienced an environment shift from circum\|shelf margin carbonate platform to foreslope, then to deep continental slope [1] . Correspondingly, the sediments change in vertical succession from quartz sandstone, via carbonate grainstone to dark shale intercalated with lithic sandstone of gravity flow. From the Tithonian to Valanginian, eight 3rd\|order sequences have been recognized [1] with clearly delineated sequence boundaries and reasonable biostratigraphic controls of ammonites. From the angle of sequence stratigraphy and sedimentary cycles, the important change happened at ca. 138Ma [2] of the Lower Tithonian (about 120m above Aulacosphinctoides hybonotum zone), where a waved subaerial erosion surface occurs in massive bioclastic grainstone. The boundary at ca. 134 5Ma (latest Tithonian, about 60m below the FAD of \%Berriasella cf. jacobi [3] ) comes to the next. The third one is at ca 132Ma (some 170m above the FAD of Berriasella cf. jacobi [3] , but about 60m below the FAD of Berriasella cf. grandis [3] ). In terms of sea\|level change, the sequence boundary at 134 5Ma is probably the most distinctive one, above which some 60m gravel\|bearing massive medium\|grained quartz sandstone was laid down and obviously truncates the underlying strata. In the dark shale below the sandstone, abundant in ammonites, such as Virgatosphinctes, Aulacosphinctes, Haplophylloceras and Gymnosphinctes are recorded [3] . The quartz sandstone itself does not bear identifiable fossils. Above the quartz sandstone, the strata mainly consists of dark silty shale up to 180m thick, with an prominent marine transgression at the base. Just above the first flooding surface (FFS), quite a number of ammonites such as \%Berriasella\% cf. \%jacobi, Blanofordiceras, Hymalayaites\% and \%Pseudosubplani

关键词： J/K boundary depositional sequences South Tibet

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Role of imaging methods in diagnosis and treatment of morton's neuroma

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World Journal of Radiology 2018年第9期10卷 91-99页

作者： Fernando Ruiz Santiago Pablo Tomas Munoz Patel Pryest Alberto Martinez Martínez nicolás Prados Olleta Radiology Department Hospital of Neuro-Traumatology(Virgen de las Nieves)Granada 18014Spain Radiology Department North Tyneside General HospitalNorth Shields NE29 8NHUnited Kingdom Orthopaedic Department Hospital of Neuro-Traumatology(Virgen de las Nieves)Granada 18014Spain

Among the many causes of forefoot pain, morton's neuroma(MN) is often suspected, particularly in women, due to its high ***, there remain controversies about its relationship with symptomatology and which diagnostic and treatment choices to *** article mainly focuses on the role of the various imaging methods and their abilities to support an accurate diagnosis of MN, ruling out other causes of forefoot pain, and as a way of providing targeted imaging-guided therapy for patients with MN.

关键词： morton’s neuroma Diagnosis Infiltrative Imaging Therapy

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