This image was acquired from
wikimedia. It was marked as Public Domain or CC0 and is free to use. To verify, go to the source and check the information there.
Keywords from Image Description:
The Quarterly journal of the Geological Society of London . cannot learn whether the fos sils were all found in the same bed should be uiclined to beheve that they were not The Flanorhis hemistoma Neritina uniplicata and some species of Fusus have never found associated with the PanopcBa intermedia and Cardium Plumsteadiense