Trilobites, their traces and associated sedimentary structures as indicators of palaeoenvironment of Cambrian of the Ociesęki Range (Holy Cross Mountains, Poland)

Michał STACHACZ
2013 Geological Quarterly  
Trilobites, their traces and as so ci ated sed i men tary struc tures as in di ca tors of the Cam brian palaeoenvironment of the Ociesêki Range (Holy Cross Moun tains, Po land) Micha³ STACHACZ 1, * 1 In sti tute of Geo log i cal Sci ences, Jagiellonian Uni ver sity, Oleandry 2a, 30-063 Kraków, Po land Stachacz M. (2013) Trilobites, their traces and as so ci ated sed i men tary struc tures as in di ca tors of the Cam brian palaeoenvironment of the Ociesêki Range (Holy Cross Moun tains, Po land).
more » ... un tains, Po land). Geo log i cal Quar terly, 57 (4): 745-756, doi: 10.7306/gq.1124 En rolled spec i mens of tri lo bite spe cies Strenuella polonica, partly pre served within their es cape struc tures and bur rows from the Cam brian Se ries 2 Ociesêki Sand stone For ma tion, are de scribed. The spec i mens are in ter preted as bur ied dur ing storm ep i sodes. Their oc cur rence in a few ho ri zons, the pres ence of non-bioturbated tempestites with com bined wave-cur rent ripples and groovemarks interbedded with bioturbated beds sug gest a depositional en vi ron ment be tween nor mal and storm wave base. The trace fos sils Monomorphichnus and some Rusophycus have been in ter preted as struc tures formed dur ing the storm when an i mal tried to take ref uge. Well-pre served syndepositional Rusophycus and its dif fer ent taphonomic variants are dis cussed. The part of the Ociesêki Sand stone For ma tion stud ied is in ter preted as de pos ited on a lower shoreface with storm in flu ence.
doi:10.7306/gq.1124 fatcat:cu2kqmb7fjemzdjurwqo2nwylq