Vertebra plana

The Ciechocinek Formation is a Jurassic (lower to middle Toarcian) geologic formation which extends across the Baltic coast from Grimmen, Germany, to Nida, Lithuania, with its major sequence in Poland and boreholes in Kaliningrad. Dinosaur species uncovered here include the Thyreorporan Emausaurus and others with an unclassified genus. [Source: Wikipedia ]