The Stadthagen Formation is a geological formation located in Hanover, Germany, dating to the Early Cretaceous (Valanginian).

[1] The formation contains fossils of reptiles and fish, suggesting that the formation was once a shallow marine setting.

[2] The Stadthagen Formation outcrops in the Engelbostel and Sachsenhagen clay pits, which operated as brickworks from 1904 to 1986.

After the brickworks closed in 1986, most of the quarry area was backfilled and used as a waste dump before being abandoned.

[2]