This segment provides an overview of the geology of the Sidmouth area in East Devon, focusing on the different rock formations present and their origins. It highlights the area's diverse geological history, spanning from the Permian to the Cretaceous periods, and emphasizes the significance of the coastal exposures for understanding Earth's ancient past. It also delves into specific formations like the Otter Sandstone, Sidmouth Mudstone, and Upper Greensand, detailing their characteristics, depositional environments, and fossils. Additionally, it touches upon the importance of coastal shingle in coastal protection and its role as a habitat for wildlife.