Sandstone with mudstone intercalations and marl with marly limestone deposited first in  shallow then in a deeper basin in the Triassic. A carbonate complex, build mainly of limestone and partly of dolomite developed in the Middle Triassic. 

Crinoids are one of the classes of animals that make up the phylum Echinodermata, which includes about 700 species of marine invertebrates, mainly found in deep waters. Their body resembles a goblet; they have five or more feathery arms, edged with feathery processes which contain their reproductive organs. There are also numerous tube feet placed on them, which perform a sensory function. The arms of the crinoids are equipped with so-called gutters, with tiny, hairy cell processes – the cilia – transporting food to the mouth. Their very characteristic internal skeleton makes thousands of extinct species extremely important Palaeozoic index fossils.

Salt exploitation history is connected in Poland, with the Miocen marine deposits filling the Pre-Carpathian basin. The salt series thickness varies from 250 m in Wieliczka up to 1500 m close to Wojnicz. It is built of five cyclothems, that is sedimentation cycles, beginning from aggregated  and argillaceous rocks (sandstones, mudstones, claystone), argillo-calcerous and anhydrite claystone to anhydrites and halites.