• Source: Aachen Formation

The Aachen Formation (Dutch: Formatie van Aken, German: Aachen-Formation) is an Upper Cretaceous geologic formation in the southern Netherlands and northeastern Belgium and adjacent Germany.
It is stratigraphically equivalent to the middle part of the Chalk Group of England, and named after the German city of Aachen.




Geography


The formation crops out in southern Belgian and Dutch Limburg and adjacent areas in Germany. The formation can also be found in the subsurface of West Flanders, where it forms an aquifer from which drinking water is won.




Geology


The Aachen Formation consists of glauconite bearing sand. It was deposited during the Santonian and Campanian ages (85.8 to 70.6 million years ago) of the Cretaceous Period.
The formation rests unconformably on top of Carboniferous rocks of the Limburg Group, which are more than three times as old. Overlying the Aachen Formation is the Vaals Formation, equivalent to the upper part of the Chalk Group of England.




Fossil content


Among others, the following fossils have been reported from the formation:




= Corals

=
Cunnolites




= Flora

=
Nicolia
Verrutriletes
Conifers
Cycadeospermum
Pollen




See also






References






= Bibliography

=
Leloux, J (1999), "Numerical distribution of Santonian to Danian corals (Scleractinia, Octocorallia) of southern Limburg, the Netherlands", Geologie en Mijnbouw, 78 (2): 191–195, doi:10.1023/A:1003743301625
Batten, D. J (1988), "Revision of S J Dijkstra's Late Cretaceous megaspore and other plant microfossils from Limburg, the Netherlands. In J. W. J. Van Amerom (ed.)", Mededelingen Rijks Geologische Dienst, 41: 1–55
Dijkstra, S. J (1961), "On megaspores, Charophyta fruits and some other small fossils from the Cretaceous", The Palaeobotanist, 8: 8–18
Dijkstra, S. J (1949), "Megaspores and some other fossils from the Aachenian (Senonian) in South Limburg, Netherlands", Mededelingen van de Geologische Stichting, Niewe Serie, 3: 19–32

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• Aachen Formation
• Aachen
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• Nicolia (genus)
• Chalk Group
• List of stratigraphic units in the Netherlands
• Formation dance
• Battle of Aachen
• List of fossiliferous stratigraphic units in the Netherlands