- : 189-184
- : ()
- : Charmouth Mudstone Formation
- : Offshore marine shelf, alternating between quiet, muddy seafloor and storm-influenced shallows
- : Ammonites, belemnites, bivalves, gastropods, crinoid fragments, marine reptiles (ichthyosaurs, plesiosaurs), plant drift
- : Offshore seabed of soft muds and occasional limestone beds; storm layers introducing shell debris; rich ammonite faunas marking biostratigraphic zones; occasional carcasses sinking to the sea floor and preserved in fine clays
