1988  Brice,D., map in fig.1.
     2002  Becker,T., Fig.1. Goniatites come from a 2.4 m shale interval with limestone nodule which starts ca. 7.7 m above the base of Unit d, at the top of the Pâtures Member of the Beaulieu Fm. in isolated nodules. Ancyrodella gigas at top of Unit c of Pâtures mb.