The crinoidal Luty Potok Limestone formerly considered as a Middle Jurassic part of the Czorsztyn Succession contains Liassic brachiopods and fragments of sponge skeletons. It belongs to the Nizna Succession. Clastic admixture derived from an external source is identical in both successions deposited on the opposite margins of the Pieninicum sedimentary zone. The Luty Potok Limestone is penetrated by a swarm of neptunian dykes which originated during repeated movements along a Liassic synsedimentary fault zone.