On development of Middle Cambrian sediments in the Gdansk Bay area

Stratigraphy and petrography of Cambrian sediments, mainly of Middle Cambrian, is presented from four boreholes (Białogóra 2, Żarnowiec 5, Władysławowo 4 and Krynica Morska 2) of the Gdańsk Bay area (northern Poland). On the basis of analysis of faunistical and lithofacial data, the sediments of Middle Cambrian were found to have been deposited in a zone close to a tidal flat (Łeba and Dębki formations) and in a sublittoral zone (Sarbsko and Osiek formations).