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Aachen Formation

The Aachen Formation is an Upper Cretaceous geologic formation in the southern Netherlands and northeastern Belgium and adjacent Germany.

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 ==
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 ==
Fossil content
Among others, the following fossils have been reported from the formation: Flora NicoliaVerrutriletes ;Conifers • Cycadeospermum ;Pollen • ChrysothecaGeleenitesSpheritesTriletes == See also ==
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