U, M, L = Upper, Middle, Lower.
+ approximate age in millions of years.
* includes the Huntingbridge and Elmore Beds.
1 this division of the Ryde Formation includes the following Members: St. Helens, Osborne, Fishbourne, Lacey's Farm, Nettlestone and Fort Albert.
2 this division of the Ryde Formation includes the following Members: Cliff End, Hatherwood Limestone, and Linstone Chine.
+ approximate age in millions of years.
* includes the Huntingbridge and Elmore Beds.
1 this division of the Headon Hill Formation includes the following Members: Seagrove Bay, Osborne Marls, Fishborne, and Lacey's Farm Limestone.
2 this division of the Headon Hill Formation includes the following Members: Cliff End, Hatherwood Limestone, and Linstone Chine.