Group | Stage | Formation | Member |
---|---|---|---|
LIAS |
Pliensbachian |
Redcar Mudstone |
Ironstone Shale |
Pyritous Shale |
The Redcar Formation is a grey, fossiliferous mudstone and siltstone with subordinate thin beds of shelly limestone below, and fine-grained carbonate cemented sandstone above; argillaceous limestone concretions occur throughout.
The upper boundary is gradational with the overlying Staithes Sandstone Formation, but is taken for consistency at the base of the "Oyster Bed", a fossiliferous calcareous and ferruginous sandstone packed with the bivalves Gryphea gigantea, Oxytoma inaequivalvis and Pseudopecten aequivalvis. This layer appears to persist as a continuous horizon throughout the Cleveland
Argillaceous limestone concretions in the Redcar Mudstone
Image by John Vincent dated: July, 2004