1. The soil is light and the underlying geology is Keuper marl . 2. It is a natural hill of Triassic sandstone capped by Keuper marl . 3. The Dolomitic Conglomerate is an old shingle beach of Keuper Marl age. 4. The junction between the Greensand and Keuper Marl forms a spring line. 5. The wood is sited on Triassic Keuper Marl rocks. 6. The soil is clay, gravel, and marl and the subsoil keuper marl . 7. The site is situated on a curved ridge of land on neutral soils derived from the underlying Keuper Marl . 8. It was in this type of environment that the Mercia Mudstone Group ( formerly Keuper Marl ) was deposited. 9. The tunnel was blasted through Limestone, Dolimitic Conglomerate and Keuper Marl and lined with a 375mm thick concrete lining. 10. The two groups as currently defined replace earlier terminology which referred to the Bunter Sandstone, Keuper Sandstone and Keuper Marl .
