Trace fossils of the Moravice Formation from the southern Nízký Jeseník Mts. (Lower Carboniferous, Culm facies; Moravia, Czech Republic)


Authors: Mikuláš R, Lehotský T, Bábek O

Published in: Bulletin of Geosciences, volume 79, issue 2; pages: 81 - 98; Received 17 December 2001; Accepted in revised form 1 July 2003;

Keywords: ichnofossils, Lower Carboniferous, Culm facies, Czech Republic,

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The Moravice Formation provides a facies association of extremely diverse turbidites comprised of facies types A, B, C, D and E. These occur in several 10-100 m cycles that become finer and thinner upwards, and alternate with thick successions of laminite. These are interpreted as channel-fill cycles alternating with overbank sediments deposited in inner- to middle-fan environments. A second, overlying facies association is comprised of thick successions of laminite and beds of facies D and C, alternating with sandstone lenses that range in thickness from several tens to about one hundred metres, and are composed of facies C and B. The second facies association was deposited as sandstone lobe and lobe-fringe sediments in an outer-fan environment. The ichnoassemblages of the first facies association are dominated by Dictyodora liebeana, which is accompanied by Chondrites isp., Phycosiphon incertum, Planolites beverleyensis, Planolites isp., Spirodesmos archimedeus and rare occurrences of Cosmorhaphe isp., Chondrites cf. intricatus, Falcichnites lophoctenoides, Pilichnus isp., Protopalaeodictyon isp. and Zoophycos isp. The second facies association occurs at the margins of greywacke lenses and contains Diplocraterion isp., Rhizocorallium isp., Dictyodora liebeana, Cosmorhaphe isp. and Paleodictyon isp.