Aachen Formation

Aachen Formation
Stratigraphic range: Santonian-Campanian ~86.3–83.6 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
The Aachen Formation in Hergenrath
Type	Geological formation
Underlies	Vaals Formation
Overlies	Limburg Group
Lithology
Primary	Sandstone
Location
Coordinates	50°48′N 5°54′E / 50.8°N 5.9°E / 50.8; 5.9
Approximate paleocoordinates	40°48′N 7°18′E / 40.8°N 7.3°E / 40.8; 7.3
Region	Dutch Limburg, Belgian Limburg, North Rhine-Westphalia
Country	Belgium, Germany, Netherlands
Type section
Named for	Aachen
Region	North Rhine-Westphalia
Country	Germany
Aachen Formation (Netherlands)

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.^[1]

It is stratigraphically equivalent to the middle part of the Chalk Group of England, and named after the German city of Aachen.