Here is a vertebral of a Nothosaurus from the Lower Muschalkalk (middle Triassic) of Gogolin, Poland.
It is completely preserved and measures about 1.6 cm. The unbroken original matrix measuring about 9 x 8 x 4 cm, and even includes a plurality of Crinoid remains (Dadocrinus).
No sumanipulations at all!
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