| Selborne Group | |
| Type: | Group |
| Period: | Albian |
| Prilithology: | Glauconitic Sandstone, |
| Otherlithology: | Mudstone, Limestone & Marl |
| Region: | England |
| Country: | United Kingdom |
| Subunits: | Gault Formation, Upper Greensand Formation |
| Underlies: | Chalk Group |
| Overlies: | Lower Greensand Group |
| Thickness: | up to 110 m in the Weald, but in marginal areas may be less than 5 m thick. |
The Selborne Group is a geologic group in England. It preserves fossils dating back to the Cretaceous period. It comprises the Gault Formation (informally/traditionally the Gault Clay or Blue Marl) and the overlying Upper Greensand Formation (earlier known as the Malm or Malm Rock).[1] [2]