Fig. 11 in Pliensbachian, Early Jurassic radiolarians from Mount Rettenstein in the Northern Calcareous Alps, Austria

Fig. 11. Combined radiolarian and ammonite dating of Lower Jurassic deposits on Mount Rettenstein. The upper age limit of the grey marly limestone is constrained with ammonites, determined in the overlying red nodular limestone, numerical age after Gradstein et al. (2012). Revised radiolarian dating of samples from the Dürrnberg Formation is shown for comparison.