It preserves fossils dating back to the Jurassic period.
It has previously been referred to as the Ancholme Clay Group.
In parts of its range it interfingers with the Corallian Group, which predominantly consists of coralliferous limestones.
This article about a specific stratigraphic formation in the United Kingdom is a stub.
You can help Wikipedia by expanding it.This article related to the Jurassic period is a stub.