Nekum Chalk, Maastricht Fm (Cretaceous of Belgium)

Where: Belgium (50.9° N, 4.7° E: paleocoordinates 43.5° N, 3.7° E)

• coordinate based on nearby landmark

• local area-level geographic resolution

When: Nekum Member (Maastricht Formation), Late/Upper Maastrichtian (70.6 - 66.0 Ma)

• STRATIGRAPHIC RELATIONS: From the Nekum Chalk of the Maastricht Fm, and overlies the Valkenburg Chalk of the Maastricht Fm. AGE: early Late Maastrichtian, on the basis of ammonite and belemnite biostratigraphy. STRATIGRAPHIC POSITION: Collection is a composite of the entire member.

• member-level stratigraphic resolution

Environment/lithology: lithified lime mudstone

• ENVIRONMENT: Shallow marine carbonate setting.
• SPECIFIC LITHOLOGY: No specific lithological data reported in text. Probably chalk. LITHIFICATION: Lithified on the basis of figured specimens.

Size class: macrofossils

Preservation: cast, mold/impression

Collection methods: surface (in situ),

• COLLECTORS: Multople collectors. REPOSITORY: Institut Royal de Science Naturelles de Belgique (IRSNB), Naturhistorisch Museum, Maastricht (NHM), Museum für Naturkunde, Berlin (MNB)

Primary reference: W. J. Kennedy. 1986. The Campanian-Maastrichtian ammonite sequence in the environs of Maastricht (Limburg, the Netherlands), Limburg and Liége provinces (Belgium). Newsletters in Stratigraphy 16(3):149-168 [A. Hendy/A. Hendy]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 82493: authorized by Austin Hendy, entered by Austin Hendy on 28.07.2008

Creative Commons license: CC BY (attribution)

Taxonomic list

• COVERAGE: Limited to representative, common, and biostratigraphically important ammonoids and belemnites. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identifications.
 Ammonitida - Sphenodiscidae
Sphenodiscus binkhorsti Böhm 1898 ammonite
 Ammonitida - Scaphitidae
Hoploscaphites constrictus Sowerby 1817 ammonite
 Ammonitida - Baculitidae
Baculites vertebralis Lamarck 1801 ammonite
Baculites anceps Lamarck 1822 ammonite
 Ammonitida - Diplomoceratidae
Diplomoceras cylindraceum Defrance 1816 ammonite