Bückeberg Formation

The Bückeberg Formation is a geologic formation and Lagerstätte[1] in Germany. It preserves fossils dating back to the Berriasian of the Cretaceous period.[2] The Bückeberg Formation has previously been considered to constitute the "German Wealden" in reference to its similarity to the Wealden Group in the United Kingdom.[3] More recently it has been considered a group, containing the Isterberg and Deister Formations. The plesiosaur Brancasaurus,[4] and an indeterminate ankylosaur referred to Hylaeosaurus are known from the formation.[5]

Bückeberg Formation Stratigraphic range: Berriasian ~145–140 Ma PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Formation
Unit of	Lower Saxony Basin
Sub-units	Ostenwald & Obernkirchen Sandstein Members
Underlies	Stadhagen Formation
Overlies	Münder Formation
Thickness	Over 500 m (1,600 ft)
Lithology
Primary	Mudstone
Other	Sandstone, coal
Location
Coordinates	52.3°N 9.2°E / 52.3; 9.2
Approximate paleocoordinates	43.5°N 17.2°E / 43.5; 17.2
Region	Niedersachsen, Nordrhein-Westfalen
Country	Germany
Bückeberg Formation (Germany)