Dyrham Formation

The Dyrham Formation is a geologic formation in England. It preserves fossils dating back to the early part of the Jurassic period (Pliensbachian).^[1]

Dyrham Formation
Stratigraphic range: Pliensbachian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Formation
Unit of	Lias Group
Sub-units	Eype Clay Member, Down Cliff Sand Member, Thorncombe Sand Member
Underlies	Beacon Limestone Formation, Marlstone Rock Formation
Overlies	Charmouth Mudstone Formation
Area	Wessex Basin, Worcester Basin, East Midlands Shelf
Thickness	~125 m
Lithology
Primary	mudstone, silt, sand
Other	ferruginous limestone
Location
Region	England
Country	United Kingdom
Type section
Named for	Dyrham

See also

• List of fossiliferous stratigraphic units in England