Example image of eyePlorer eyePlorer map for 'Purbeck Group': Early Cretaceous England Group (stratigraphy) Late Jurassic Lithostratigraphy Stratum Dorset Isle of Purbeck Swanage Mammal Reptile Stage (stratigraphy) Berriasian Geologic time scale Tithonian Aylesbury Brill Garsington Lincolnshire Sussex Swindon Yorkshire Clay Limestone Marl Marly Oolitic Shale Wealden Group Russia Boulogne-sur-Mer Gypsum Weald–Artois anticline Charente Germany Purbeck Marble Portland stone Isle of Portland Fossil Hemicidaris Ostrea Melanopsis Planorbis Unio Viviparus Chelone Chelonian Crocodilia Dinosaur Echinodon