Landslips have occurred through a long period of geological time right up to the present. The landform of the Escarpment and Enclosed Limestone Valley landscape types of the Bathscape area. The alternating layers of harder Oolite limestones and softer clays and sands has given rise to which are of key importance in shaping In terms of surface geology, the Lower Lias Clay and Midford Sand form the substantial part of the lower and middle slope of the escarpment, the Inferior Oolite forms the upper middle slope and the Fuller Earth the upper slopes with Greater Oolite limestone capping Kelston Roundhill. Below the Fullers Earth Rock is a layer of Lower Fullers Earth and then below that a harder layer of Inferior Oolite Series limestone followed by Midford Sand from the Upper Lias Group and finally Lower Lias Clay. Kelston Roundhill stands proud of the Fullers Earth Rock and comprises a cap of Greater Oolite Limestone below which is Upper Fullers Earth and then the Fullers Earth Rock. The geology of this area is topped primarily by Fullers Earth Rock From the Greater Oolite Group of the Middle Jurassic Period.
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