| Site of Special Scientific Interest | |
 | |
| Area of Search | East Sussex |
|---|---|
| Grid reference | TQ 556 111 [1] |
| Interest | Geological |
| Area | 0.1 hectares (0.25 acres) [1] |
| Notification | 1998 [1] |
| Location map | Magic Map |
Lower Dicker is a 0.1-hectare (0.25-acre) geological Site of Special Scientific Interest west of Hailsham in East Sussex. [1] [2] It is a Geological Conservation Review site. [3]
Exposures of a sand member are present in the quarry. The sand is of the lower division of the Weald Clay. The sandstone units of the Weald Clay Group represent river deposits which periodically extended into the Wealden lake or lagoon. The sandstones are important as lithostratigraphical markers (units of rock with the same affinity) and are considered to reflect the effects of tectonic uplift in nearby areas feeding sediment into the area. The mineralogy of these sandstones reflects their provenance and they are therefore of great importance for understanding the changes which took place in the palaeogeography of the Weald.
Upper Dicker provides the most southerly exposure of any of the Weald Clay sand members in Britain. It is also important for marking the furthest known extension eastwards of Cornubian (what is today Devon and Cornwall) debris (pieces of rock incorporated into the sandstones and clays), indicating the presence of a river system extending out of south-west England at this time.
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Netherside Stream Outcrops is a 2.9-hectare (7.2-acre) geological Site of Special Scientific Interest north-east of Haslemere in Surrey. It is a Geological Conservation Review site.
High Rocks is a 3.2-hectare (7.9-acre) geological Site of Special Scientific Interest west of Tunbridge Wells in East Sussex and Kent. It is a Geological Conservation Review site.
Houghton Green Cliff is a 0.14-hectare (0.35-acre) geological Site of Special Scientific Interest north of Rye in East Sussex. It is a Geological Conservation Review site.
Brighton to Newhaven Cliffs is a 165.4-hectare (409-acre) biological and geological Site of Special Scientific Interest and Geological Conservation Review site, which stretches along the coast between Brighton and Newhaven in East Sussex. An area of 16.4 hectares is the Castle Hill, Newhaven Local Nature Reserve
Dungeness, Romney Marsh and Rye Bay is a 10,172.9-hectare (25,138-acre) biological and geological Site of Special Scientific Interest which stretches from New Romney in Kent to Winchelsea in East Sussex. An area of 5,129.5 hectares is a Special Protection Area, an area of 3,141.1 hectares is a Special Area of Conservation, and an area of 6,377.6 hectares is a Ramsar Site, a wetland site designated of international importance under the Ramsar Convention. Part of the site is in the High Weald Area of Outstanding Natural Beauty, parts are Geological Conservation Review sites, part is a Local Nature Reserve, and part is a Royal Society for the Protection of Birds nature reserve, and part is a National Nature Reserve.
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Turners Hill SSSI is a 0.2-hectare (0.49-acre) geological Site of Special Scientific Interest in Turners Hill in West Sussex. It is a Geological Conservation Review site.
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