The Wildegg Formation forms the uppermost part of the upper confining units in the NL and ZNO siting regions (Section 4.5.3.4). It was deposited during the Late Jurassic in a shallow marine epicontinental setting (Chapter 3). The depositional environment corresponded to a mixed carbonate-siliciclastic setting with a depositional centre between Olten, Aarau and Brugg. In the JO siting region, the upper part of the Wildegg Formation is partly eroded.

Fig. 4‑47:Map of depositional environment during the Late Jurassic (Middle to Late Oxfordian) preserved in the Wildegg Formation

Refer to Fig. 4‑3 for a schematic representation of depositional environments. The north arrow refers to present-day geographic north.