Ammonite finds at the Miroshniki site, within the Albian-Cenomanian boundary interval, make it possible to identify the presence of the analogues of the Upper Albian zones Mortoniceras fallax (autochthonous burial within aleurolites) and Mortoniceras rostratum (allochthonous occurrence among phosphorite nodules). In this very section, an elasmobranchian assemblage has been isolated from the phosphorite interlayers; this is represented by 9 series and 13 genera. Small sand sharks Eostriatolamia subulata (Ag.) are dominant in its content.
