The Campanian-Maastrichtian ammonite sequence in the environs of Maastricht (Limburg, the Netherlands), Limburg and Liège provinces (Belgium)
Kennedy, William James
Newsletters on Stratigraphy Volume 16 Number 3 (1986), p. 149 - 168
published: Oct 13, 1986
ArtNo. ESP026001603006, Price: 29.00 €
The Campanian and Maastrichtian ammonites from the environs of Maastricht, Limburg, The Netherlands and Limburg and Liège Provinces, Belgium are revised on the basis of the collections of the Museum für Naturkunde, Berlin (the Binkhorst Collection), Institut Royal des Sciences Naturelles de Belgique (Brussels) and Naturhistorisch Museum, Maastricht. The Vaals Formation yields a Lower Campanian assemblage at most localities, but there is an unexpected record of the Upper Maastrichtian H. marroti (Coquand 1859) from Vijlen, near Cottessen. Important Upper Campanian records from the Zeven-Wegen Chalk are Hoplitoplacenticeras coesfeldiense (Schlüter 1867) and Trachyscaphites spiniger (Schlüter 1872) from Vijlenerbosch. Diagnostic Lower Maastrichtian ammonites are few, with only poorly localised specimens of Acanthoscaphites tridens (Kner 1848). Hoploscaphites tenuistriatus (Kner 1848), a species which spans the Lower-Upper Maastrichtian boundary elsewhere in Europe, occurs in the Vijlen Chalk at Mesch. The celebrated Upper Maastrichtian fauna of the Calcaire de Kunraed is equivalent to that present in the Nekum and Lower Meerssen Chalk. The Upper part of the Meerssen Chalk yield crassus forms of Hoploscaphites constrictus G. Sowerby 1817) and most (but not all) of the Sphenodiscus binkhorsti Böhm, 1898 recorded from the area. The types of Pachydiscus colligatus of Binkhorst (1861) are shown to cover four species of Pachydiscus with true colligatus a Campanian species unknown in the environs of Maastricht.