The Wildegg Formation was deposited in the Late Jurassic during the Middle to the Late Oxfordian (Gygi 1969). Timelines were picked mostly near the Gerstenhübel Bed (154.8_Oxf_750 and 154.8_Oxf_700). The top of the Wildegg Formation is diachronous (Deplazes et al. 2013).