Paleoecological research was carried out on the Lemau Formation in the Muara Simpur area and its surroundings, Ulu Talo District, Seluma Regency, Bengkulu Province. The research area is in the Bengkulu Arc Fore Basin. The Lemau Formation is composed of carbonate and non-carbonate rocks which are influenced by tidal activity, including breccia, non-carbonate sandstone, carbonate sandstone, mudst…