Lilstock Formation
Geology
Group: Penarth
Members: Cotham (6), Langport (2)
Lithologies: not reported (4), "shale" (1), siltstone (1), sandstone (1), marl (3), "limestone" (2)
Paleoenvironments: marine indet. (6), carbonate indet. (2)
Age range: Rhaetian or 205.70000 to 201.40000 Ma