 In this warmer phase after the extinction of the dinosaurs, the Mainz basin was regularly connected to the surrounding seas, in between these connections were lost, the inland sea sweetened out, a lake was formed and finally the water disappeared completely.In this change numerous animal species lived here, so there are traces of, amongst others, Manatees, Basking sharks, reef-forming mussel banks, but also land creatures, such as the Deinotherium, which was found in Eppelsheim.Especially artefacts from the Taunus originate from the Devonian, an equally warm time with a high sea level.