Fig 2. Diagenetic distortion of the bone bearing strata at the Bromacker quarry result in plastic deformation of the fossils.

A: The original skull was bilateral symmetric with perpendicular rostro-caudal (not shown), latero-lateral (red), and dorso-ventral (blue) axes. B: Preservation is non-orthogonal to main directions of diagenetic distortion resulting in complex plastic deformation of a fossil. C: The main directions of diagenetic distortion were vertical compaction (large arrow) and, to a significantly lesser extent, horizontal tectonic deformations (smaller arrows). D: A volume render of the skull of MNG 10181 to illustrate the extent of plastic deformation, fractures of bones, and the high resolution of the CT scan data.