Modelling tidal current-induced bed shear stress and palaeocirculation in an epicontinental seaway: the Bohemian Cretaceous Basin, Central Europe

0357547 - GFÚ 2011 RIV GB eng J - Článek v odborném periodiku
Mitchell, A. J. - Uličný, David - Hampson, G. J. - Allison, P. A. - Gorman, G. J. - Piggott, M. D. - Wells, M. R. - Pain, C. C.
Modelling tidal current-induced bed shear stress and palaeocirculation in an epicontinental seaway: the Bohemian Cretaceous Basin, Central Europe.
Sedimentology. Roč. 57, č. 2 (2010), s. 359-388. ISSN 0037-0746. E-ISSN 1365-3091
Grant CEP: GA AV ČR(CZ) IAA300120609
Klíčová slova: bed shear stress * Bohemian Cretaceous Basin * epicontinental sea * tidal circulation * Turonian
Kód oboru RIV: DB - Geologie a mineralogie
Impakt faktor: 2.229, rok: 2010

Lower to Middle Turonian deposits within the Bohemian Cretaceous Basin (Central Europe) consist of coarse-grained deltaic sandstones passing distally into fine-grained offshore sediments. Dune-scale cross-beds superimposed on delta-front clinoforms indicate a vigorous basinal palaeocirculation capable of transporting coarse-grained sand across the entire depth range of the clinoforms (ca 35 m). Bi-directional, alongshore-oriented, trough cross-set axes, silt drapes and reactivation surfaces indicate tidal activity. However, the Bohemian Cretaceous Basin at this time was over a thousand kilometres from the shelf break and separated from the open ocean by a series of small islands. The presence of tidally-influenced deposits in a setting where co-oscillating tides are likely to have been damped down by seabed friction and blocked by emergent land masses is problematic.
Trvalý link: http://hdl.handle.net/11104/0195801