Xylic substrates at the fossilization barrier: oak trunks (Qercus robur) in the Holocene sediments of the Labe River, Czech Republic

0049542 - GLÚ 2007 eng A - Abstrakt
Mikuláš, Radek
Xylic substrates at the fossilization barrier: oak trunks (Qercus robur) in the Holocene sediments of the Labe River, Czech Republic.
[Dřevité substráty na fosilizační bariéře: kmeny dubů (Quercus robur) v holocénních usazeninách Labe, Česká republika.]
5th International Bioerosion Workshop. Programme & Abstracts. Erlangen: Institute of Paleontology, Erlangen University, 2006 - (Wisshak, M.; Löffler, S.; Schulbert, C.; Freiwald, A.). s. 29-29. ISBN 3-00-019664-1.
[International Bioerosion Workshop /5./. 29.10.2006-03.11.2006, Erlangen]
Grant CEP: GA AV ČR IAA300130505
Výzkumný záměr: CEZ:AV0Z30130516
Klíčová slova: ichnofossils * wood borings * fluvial settings * subaerial
Kód oboru RIV: DB - Geologie a mineralogie

Buried and initially coalified trunks of Quercus robur occur frequently in sands of the Holocene alluvial plain of the Labe River (central Bohemia, Czech Republic). Three different suites of bioerosive traces can be presumed in the wood: (1) those made probably by ligniperdous fungi during the life of the trees; (2) insect borings made by insect larvae in dead wood before its burial. They can bear perfectly preserved tracemakers in situ; (3) insect borings made after the re-burial of the trunks. The above-mentioned instances cannot be always recognized with certainty; moreover, all tunnel-shaped and camerate borings can be squatted by ants, beetles and less frequently by other representatives of arthropods. Notably, none of the traces found can be attributed to the phase of submergence of wood in fresh water, i.e. wood borings analogous to the Teredolites ichnofacies were not found.
Trvalý link: http://hdl.handle.net/11104/0139904