Paleocene ammonites
The term Paleocene ammonites describes families or genera of
Implications
There have been reliable reports of ammonite fossils from the early Paleocene. The most notable fossil finds of Paleocene ammonoids are Baculites vertebralis and Hoploscaphites constrictus in Denmark, the survivors joined by Eubaculites carinatus in the Netherlands.[1][2][3][4][5]
Discoscaphites and Eubaculites (potentially along with other ammonite genera, such as Pachydiscus and Sphenodiscus) have reportedly been found in the Paleocene Hornerstown and Tinton Formations in New Jersey (dating to 66-65 Ma).[3][6] However, there are questions whether some remains are not reworked from Maastrichtian layers.[1][7] A single scaphitiid mould (tentatively referred to Hoploscaphites) was dated to the lower Danian, in the Sumbar River section of the western Kopet Dagh in Turkmenistan.[8][9] Scattered remains of Eubaculites which were found near the Brazos River, Texas, were dubiously dated to the Danian.[10]
List of purported Paleogene ammonite fossils
- Cerithium Limestone, Denmark: Baculites vertebralis, Hoploscaphites constrictus[1][2][3][8][9]
- Maastricht Formation (Meerssen Member unit IVf-7), Netherlands: Baculites vertebralis, Eubaculites carinatus, Hoploscaphites constrictus[1][4]
- Tinton Formation and Hornerstown Formation, New Jersey: Discoscaphites, Eubaculites and possibly also Pachydiscus and Sphenodiscus[1][3][6][7]
- ?Sumbar River, Turkmenistan? :"Hoploscaphites constrictus johnjagti"[1][8]
- ?Brazos River K-T Boundary, Texas?: Eubaculites fragments[10]
References
- ^ ISBN 978-94-017-9632-3, retrieved 2021-10-26
- ^ .
- ^ ISSN 0033-2151.
- ^ a b c W. M. Jagt, John (2012-01-01). "Ammonieten uit het Laat-Krijt en Vroeg-Paleogeen van Limburg". Grondboor & Hamer. 66 (1): 154–183.
- ^ a b "Late Maastrichtian and earliest Danian scaphitid ammonites from central Europe: Taxonomy, evolution, and extinction - Acta Palaeontologica Polonica". www.app.pan.pl. Retrieved 2021-10-26.
- ^ a b Neil H. Landman, Matthew P. Garb, Remy Rovelli, Denton S. Ebel, and Lucy E. Edwards "Short-Term Survival of Ammonites in New Jersey After the End-Cretaceous Bolide Impact," Acta Palaeontologica Polonica 57(4), 703-715, (1 December 2012). https://doi.org/10.4202/app.2011.0068
- ^ a b Gallagher, W.B. (2005). "Recent mosasaur discoveries from New Jersey and Delaware, USA: stratigraphy, taphonomy and implications for mosasaur extinction." Netherlands Journal of Geosciences — Geologie en Mijnbouw, 84(3): 241-245. [1] Archived 2012-09-04 at the Wayback Machine
- ^ S2CID 55940319.
- ^ ISBN 978-1-61168-923-5.
- ^ S2CID 231597207.
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