BRICK CLAY (11)
| Brick clay: Palaeogene, Reading Formation (Hants only) |
SAND AND GRAVEL SUPERFICIAL (12)
| Sub-alluvial River Terrace deposits - Inferred resources |
| Sub-alluvial River Terrace deposits - Indicated resources in area assessed by BGS |
| River Terrace deposits |
| River Terrace deposits - Concealed resources |
| River Terrace deposits - Concealed resources in areas assessed by BGS |
| Head gravel deposits - Indicated resources in area assessed by BGS |
SAND AND GRAVEL BEDROCK (13)
| Construction sand: Palaeogene: Thanet Sand Formation, Lambeth Group, Harwich Formation, London Clay Formation |
CHALK (14)
| Higher purity chalk (93-98% CaCO3): Cretaceous, White Chalk Subgroup |
| Lower purity chalk (<93% CaCO3): Cretaceous, Grey Chalk Subgroup |
COAL DEEP (15)
| Deep coal between 50m and 1200m |
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