Middle Turonian trace fossils from the Bystrzyca and Długopole sandstones

Abstract

The Mid dle Turonian sed i ments of the Nysa K³odzka Graben (Bystrzyca Sand stone in the Stara Bystrzyca out crop and the D³ugopole Sand stone in D³ugopole Górne Quarry) con tain trace fos sils, which in clude Curvolithus sim plex, ?Macaronichnus isp., Ophiomorpha nodosa, Ophiomorpha isp., Palaeophycus tubularis, Thalassinoides cf. paradoxicus, T. suevicus and Thalassinoides isp. The as sem blage of trace fos sils points to the prox i mal Cruziana ichnofacies, that char ac ter izes the dis tal lower shoreface and the ar che typal Cruziana ichnofacies, typ i cal of up per off shore set tings. The trace fos sils ev i dence implies that sed i men ta tion took place in a shal low ba sin with pe ri ods of a sud den sed i ment in put, good ox y gen a tion and nor mal sa lin ity. The Bystrzyca and D³ugopole sand stones are de pos its of the shal low epicontinental sea that were de pos ited between the fair-weather and storm-wave base, in the dis tal lower shoreface-up per off shore set ting. The Bystrzyca Sand stone is rec og nized as storm-orig i nated de pos its, whereas the D³ugopole Sand stone is prob a bly the part of prograding "ac cu mu lation ter race". The source of ma te rial for the sand stone was the East Sudetic Is land and prob a bly also the Orlica-Bystrzyca Up lift. The stud ied sand stones are re lated to a re gres sion that started in the early/mid dle Mid dle Turonian and caused a rel ative up lift of the sur round ing land.

Trace fossils from the Lower Muschelkalk of Raciborowice Górne (North Sudetic Synclinorium, SW Poland) and their palaeoenvironmental interpretation

“…2 Singh et al 2008;Jaglarz and Uchman 2010;Hofmann et al 2011). In siliciclastic deposits, Thalassinoides is indicative of lower shoreface-offshore settings (Pemberton et al 2001;Uchman and Krenmayr 2004;Buatois and Mángano 2011;Chrząstek 2013;La Croix et al 2013). It is also reported from the inner-middle carbonate ramp (Knaust 1998;, and mostly from shallow carbonate deposits (Monaco and Giannetti 2002;Jach 2005;Waite et al 2008Waite et al , 2013Vlahovic et al 2011;Wiedl et al 2012Wiedl et al , 2013.…”

Coniacian sandstones from the North Sudetic Synclinorium revisited: palaeoenvironmental and palaeogeographical reconstructions based on trace fossil analysis and associated body fossils

“…This ichnogenus, where it appears in abundance, is most typical of the distal lower shoreface (see ichnological-sedimentological models by Pemberton et al, 2001. Several authors have typified such environments as the most characteristic of Thalassi noides (Uchman & Krenmayr, 2004;Pervesler et al, 2011;Chrząstek, 2013b;Mayoral et al, 2013). On the other hand, single occurrence of Thalassinoides can be observed also in upper shoreface-middle shoreface settings (Hampson & Storms, 2003;Malpas et al, 2005;Leszczyński, 2010;Buatois & Mángano, 2011;Bayet-Goll et al, 2015).…”