Hallembaye [Vijlen Chalk, Gulpen Fm]: Early/Lower Maastrichtian, Belgium
List of taxa
Where & when
Geology
Taphonomy & methods
Metadata & references
Taxonomic list
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Cephalopoda
- Ammonitida
- Pachydiscidae
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Pachydiscus sp.
Zittel 1884
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| see common names | |||||||
Geography
| Country: | Belgium |
| Coordinates: | 50.8° North, 5.7° East (view map) |
| Paleocoordinates: | 43.3° North, 4.6° East |
| Basis of coordinate: | based on nearby landmark |
| Geographic resolution: | outcrop |
Time
| Period: | Cretaceous | Epoch: | Late/Upper Cretaceous |
| Stage: | Maastrichtian | 10 m.y. bin: | Cretaceous 8 |
| Key time interval: | Early/Lower Maastrichtian | ||
| Age range of interval: | 72.10000 - 66.00000 m.y. ago |
Stratigraphy
| Formation: | Maastricht | Member: | Vijlen | ||
| Stratigraphic resolution: | bed | ||||
| Stratigraphy comments: STRATIGRAPHIC RELATIONS: From the Vijlen Chalk of the Maastricht Fm, and overlies the Beutenaken Chalk of the Gulpen Fm. Where the Beutenaken Chalk is missing, the Vijlen Chalk rests unconformably on the Zeven Wegen Chalk. AGE: late Early Maastrichtian, on the basis of ammonite and belemnite biostratigraphy; Belemnella cimbrica zone. STRATIGRAPHIC POSITION: From unknown position within formation. | |||||
Lithology and environment
| Primary lithology: | phosphatic lithified lime mudstone |
| Includes fossils? | Y |
| Lithology description: SPECIFIC LITHOLOGY: No specific lithological data reported in text. Probably chalk. LITHIFICATION: Lithified on the basis of figured specimens. | |
| Environment: | carbonate indet. |
| Geology comments: ENVIRONMENT: Shallow marine carbonate setting. | |
Taphonomy
| Modes of preservation: | cast,mold/impression,replaced with phosphate |
| Size of fossils: | macrofossils |
Collection methods and comments
| Collection excludes: | some macrofossils |
| Collection methods: | surface (in situ),survey of museum collection |
| Reason for describing collection: | taxonomic analysis |
| Collection method comments: COLLECTORS: Multiple collectors. REPOSITORY: Institut Royal de Science Naturelles de Belgique (IRSNB), Naturhistorisch Museum, Maastricht (NHM), Museum für Naturkunde, Berlin (MNB) | |
| Taxonomic list comments:COVERAGE: Limited to representative, common, and biostratigraphically important ammonoids and belemnites. NOMENCLATURE: Not an authoritative publication, but with modern nomenclature and species-resolution identifications. | |
Metadata
| Database number: | 82924 | ||
| Authorizer: | A. Hendy | Enterer: | A. Hendy |
| Modifier: | A. Hendy | Research group: | marine invertebrate |
| Created: | 2008-08-05 03:13:17 | Last modified: | 2013-11-25 13:37:23 |
| Access level: | the public | Released: | 2008-08-05 03:13:17 |
| Creative Commons license: | CC BY |
Reference information
Primary reference:
| 27872. | W. J. Kennedy. 1986. The ammonite fauna of the type Maastrichtian with a revision of Ammonites colligatus Binkhorst, 1861. Bull. Inst. r. Sci. nat. Belg.: Science de la Terre 56:151-267 [A. Hendy/A. Hendy] |