|
Rock Type
|
Sediment
|
Picture
|
|
Chalk - limestone
|
Marine Organisms
|
 |
|
Greensand - sandstone
|
Sand grains
|
 |
|
Wealden Beds – Sandstone, clays
|
Sand grains, clays and organic matter
|
 |
|
Purbeck Beds – limestone, clays, shales
|
Shells, clay, silt
|
 |
|
Portland Limestone
|
shells
|
|
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