Stratigraphically above the Lower Greensand Group is the Selborne Group which comprises a suite of mudstones, siltstones, sandstones and limestones laid down during the Albian age between 112 and 94 million years ago. It divides into an earlier Gault Formation and a later Upper Greensand Formation. These outcrop in a thin tract of country, typically 1-2 km in width, at the foot of the north-facing South Downs scarp.