Selborne Group
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]
| Selborne Group | |
|---|---|
| Stratigraphic range: Albian-Cenomanian | |
| Type | Group | 
| Sub-units | 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. | 
| Lithology | |
| Primary | Glauconitic Sandstone, | 
| Other | Mudstone, Limestone & Marl | 
| Location | |
| Region | England | 
| Country | United Kingdom | 
References
    
- Various Contributors to the Paleobiology Database. "Fossilworks: Gateway to the Paleobiology Database". Retrieved 17 December 2021.
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