Lower kimmeridgian biostratigraphy in Poland / Биостратиграфия нижнего киммериджа Польши

The present study of Lower Kimmeridgian biostratigraL ^ H phy in Poland is based on the following ammonites: Ataxioceras, Ne114 brodites, Katroliceras, Glochiceras, Streblites, Taramelliceras, Idoceras, Sutneria, Orthosphinctes, Lithacoceras, Aspidoceras, Amoeboceras, Ringsteadia, Rasenia, Pictonia, and Zonovia. The analysis of this fauna confirms that the Lower Kimmeridgian sediments in Poland, also in its northern parts, have rightly been subdivided into the following three zones: the lower one — Sutneria platynota, the middle one — Ataxioceras hypselocyclum, and the upper one — Katroliceras divisum (partly).
The Lower Kimmeridgian basin in Poland belonged entirely to the Submediterranean province, with a slightly marked boreal influence in the northern part of the country (Amoeboceras, Ringsteadia, Pictonia, Zonovia). This basin had a good connection with the Tethyan Sea, but its connection with the basin in north-western Europe was difficult and with that in the East quite impossible. The ammonites and the accompanying fauna confirm the fact that the Lower Kimmeridgian sediments in Poland were deposited in a sublitoral environment, in a basin that was, in general, not deep. <...>