|The stratigraphic range of the index ammonite Pachydiscus neubergicus (von Hauer, 1858) in the type area of the Maastrichtian Stage|
Jagt, J.W.M.; Felder, W.M. (2003). The stratigraphic range of the index ammonite Pachydiscus neubergicus (von Hauer, 1858) in the type area of the Maastrichtian Stage. Geol. Mijnb. 82(3): 261-268
In: Netherlands Journal of Geosciences. Kluwer/Cambridge University Press: Den Haag, Cambridge. ISSN 0016-7746, more
Maastrichtian; Ammonoidea † [WoRMS]; Belgium, Liège; Marine
Maastrichtian; ammonites; stratigraphic range
|Authors|| || Top |
- Jagt, J.W.M.
- Felder, W.M.
In the extended type area of the Maastrichtian Stage (southern Limburg, the Netherlands; provinces of Limburg and Liege, Belgium; Aachen area, Germany), the pachydiscid Pachydiscus (P) neubergicus (von Hauer, 1858) ranks amongst the rarer species of Campanian-Maastrichtian ammonites. To date, just four specimens are known, which show P (P) neubergicus in this area to have been confined to the Vijlen Member (Intervals 0-6, Gulpen Formation). This would correspond to the basal sumensis Zone to the lower cimbrica Zone, or tegulatus/junior Zone, depending on placement of the Lower/Upper Maastrichtian boundary. Material available has been collected in recent years at the CBR-Lixhe (Liege, Belgium) and ENCI-Maastricht bv (Maastricht) quarries as well as from outcrop 62D-26 at Vijlenerbosch (Vijlen, the Netherlands). Records of P (P) neubergicus, the proposed index for the base of the Maastrichtian Stage, from elsewhere in Europe (northern Spain, SW France, Austria, Denmark, Bulgaria), suggest it to have been fairly long-ranging and show local first occurrences to have been diachronous.