Äolische Sandebenen, Fluss- und Playasee-Ablagerungen in der Hessischen Senke: Die Detfurth-Formation (Mittlerer Buntsandstein, Untertrias) zwischen Marburg und Hessisch-Lichtenau.

Aeolian sediments are widespread along the western margin of the Hessian Depression and partly build up the entire Detfurth Formation. To the northeast, towards the central Hessian Depression, they interfinger with aquatically deposited sediments, but are still widely traceable. In profiles containing the Detfurth Claystone or its equivalents, aeolianites sometimes still occur up to 18 m thick above the pelites. Based on detailed sedimentological recordings and facies interpretations of the core drillings Remsfeld GWM6 (2017) and Hirschhagen BK04/10 (2004) as well as evaluation of previously unpublished drill profiles of the core drillings Kirtorf GW3 (2001), Borken Z1 (1984/85) and Oberkaufungen I (2000), the spatial relationships of the aeolian, fluviatile and limnic facies of the Detfurth Formation between Marburg and Hessisch-Lichtenau are reconstructed. A preliminary facies model explains the observed lateral and vertical sequences of deposits of dry and wet aeolian sand plains, aquatic-dominated sand plains, deltas, fluvial plains and the central (mega-)playa lake. The spatial relationships of the previous subformations Detfurth Sandstone, "Detfurth Wechselfolge" (alternating sequence) and Detfurth Claystone, which clearly deviate from a "layer-cake geometry" in the Hessian Depression, can also be clarified using this model. For geogenetic reasons, but also because of the completely different rock properties of fluvial and aeolian sediments, it is proposed to combine the aeolianites in a separate subformation. Considerations on the temporal development of base level, water supply and sediment supply lead to a sequence-stratigraphic concept for the sediments of the Detfurth Formation in the western to northern Hessian Depression. [ABSTRACT FROM AUTHOR]