S1: Chemostratigraphy of the Upper Jurassic (Kimmeridgian–Tithonian) Pałuki Formation of central Poland and its correlation to organic matter rich deposits of Western Europe

Fig. S1. Detailed biostratigraphy, TOC and MS trends of the Pałuki Formation in the Uniejów IGH 1 and Koło IG 4 borehole sections from central Poland. Marked 405 kyr cycle boundaries of the Kimmeridge Clay Formation (Huang et al. 2010) are transposed into the Pałuki Formation according to biostratigraphical and chemostratigraphical data (see Discussion section for details).