Ancholme Group

The Ancholme Group is a geological group in England. It preserves fossils dating back to the Jurassic period. It has previously been referred to as the Ancholme Clay Group. The group consists of predominantly grey, marine mudstone and silty mudstone with beds of argillaceous limestone nodules. In parts of its range it interfingers with the Corallian Group, which predominantly consists of coralliferous limestones.^[1]

Ancholme Group
Stratigraphic range: Callovian-Kimmeridgian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Group
Sub-units	Kellaways Formation, Oxford Clay, West Walton Formation, Ampthill Clay, Kimmeridge Clay
Underlies	Portland Group
Overlies	Great Oolite Group
Thickness	350m (in central/eastern Lincolnshire)
Lithology
Primary	Mudstone
Other	Limestone, Marl
Location
Region	England
Country	United Kingdom

See also

• Earth sciences portal
• England portal
• Paleontology portal

• List of fossiliferous stratigraphic units in England