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. 2017 Dec 13;3(12):e1701144. doi: 10.1126/sciadv.1701144

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Copyright © 2017 The Authors, some rights reserved; exclusive licensee American Association for the Advancement of Science. No claim to original U.S. Government Works. Distributed under a Creative Commons Attribution NonCommercial License 4.0 (CC BY-NC).

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Fig. 1 — (A) Location of Bonenburg clay pit in eastern North Rhine-Westphalia, Germany. (B) Measured section of the Norian to Hettangian deposits with the discovery horizon (indicated by plesiosaurian silhouette and red arrows) of Rhaeticosaurus mertensi and the bonebeds with the Triassic vertebrate fauna. Horizons of lowermost Jurassic ammonites indicated by silhouettes. Colors of the rock types in the main stratigraphic column approximate colors in fresh outcrop. Cly, claystone; Fss, fine-grained sandstone; Het., Hettangian; L. J., Lower Jurassic; Md, mudstone; Slt, siltstone.