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Cambrian and Ordovician of the St. Petersburg Region

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    0029179 - GLÚ 2006 RIV RU eng M - Monography Chapter
    Mikuláš, Radek - Dronov, A. V.
    Trace fossils.
    [Ichnofosilie.]
    Cambrian and Ordovician of the St. Petersburg Region. St. Petersburg: St Petersburg State University and A.P. Karpinsky All-Russian Research Geological institute, 2005 - (Dronov, A.; Tolmacheva, T.; Rayevskaya, E.; Nestell, G.), s. 33-38
    R&D Projects: GA ČR(CZ) GA205/04/0151
    Institutional research plan: CEZ:AV0Z30130516
    Keywords : ichnofossils * sequence stratigraphy * Ordovician
    Subject RIV: DB - Geology ; Mineralogy

    Ichnofabric (bioturbation and bioerosion) patterns show a conspicuous symmetry across the Volkhov depositional sequence, which suggests a close relationship between the ichnofabric and the sea-level change. Bioclastic limestones interpreted as calcareous tempestites show evidence of relatively deep bioturbation (ca. 15 cm) of high intensity. Ichnogenera Thalassinoides, Chondrites, Paleophycus, ? Dolopichnus, Trypanites, Gastrochaenolites and Planolites participate for the most part in the overall substrate disturbance.

    Základní vzorce ichnostavby (bioturbace a bioeroze) jeví nápadnou symetrii v rámci volchovské sedimentární sekvence(střední ordovik), což poukazuje na závislost mezi kolísáním mořské hladiny a ichnostavbou. Bioklastické vápence interpretované jako karbonátové tempestity jsou bioturbovány do velké hloubky - až 15 cm. Největší podíl na bioturbaci mají ichorody Thalassinoides, Chondrites, Paleophycus, ? Dolopichnus, Trypanites, Gastrochaenolites a Planolites.
    Permanent Link: http://hdl.handle.net/11104/0119045
     
Number of the records: 1  

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