The Ordovician stratigraphy and palaeogeography of the Nida-Holy Cross Mts. area, Poland - a review

Modliński Z. and Szymański B. (2001) — The Or do vi cian stra tig ra phy and palaeo ge ogra phy of the Nida-Holy Cross Mts. area, Po land — a re view. Geol. Quart., 45 (4): 417–433. Warszawa. The Or do vi cian stra tig ra phy in the Holy Cross Mts. and the Nida region is re viewed. In the Holy Cross Mts. Or do vi cian rocks have been iden ti fied in the Łysogóry and the Kielce seg ments in tens of out crops and bore hole sec tions, in the Nida area in three bore holes. The de-pos its com prise a thin clastic-carbonate suc ces sion in clud ing palaeontologically dated Tremadoc, Arenig, Llanvirn, Llandeilo, Caradoc and Ashgill sed i ments. Their li thol ogy, litho- and biostratigraphy and fa cies dis tri bu tion are dis cussed. The most dis tinct lithofacies bound ary and thick ness con trast is ob served be tween the Kielce and Łysogóry re gions. The for mer is char ac ter ised by car bon ates and clastics of shal lower shelf with much greater thick nesses.