The Aachen Formation (Dutch: Formatie van Aken; German: Aachen-Formation) is a geologic formation in the southern Netherlands and northern Belgium. It is part of the Chalk Group and named after the German city of Aachen.
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.
The Aachen Formation consists of glauconite bearing sand. It was deposited during the Santonian and Campanian ages (85.8 - 70.6 million years ago). Its base is an unconformity on top of Carboniferous rocks of the Limburg Group, which are more than three times as old. On top of the Aachen Formation is the Vaals Formation, also part of the Chalk Group.
Famous quotes containing the word formation:
“I want you to consider this distinction as you go forward in life. Being male is not enough; being a man is a right to be earned and an honor to be cherished. I cannot tell you how to earn that right or deserve that honor. . . but I can tell you that the formation of your manhood must be a conscious act governed by the highest vision of the man you want to be.”
—Kent Nerburn (20th century)