Atherfield Clay Formation

The Atherfield Clay Formation is a Geological formation in Southern England. Part of the Lower Greensand Group it dates to the Aptian age of the Early Cretaceous. The deposit is of marine origin largely consisting of massive yellowish brown to pale grey mudstones.[1] The pterosaur Vectidraco is known from the formation.[2] As is the Sandownid turtle Sandownia.

Atherfield Clay Formation
Stratigraphic range:
Atherfield Point
TypeGeological formation
Unit ofLower Greensand Group
Sub-unitsChale Clay Member
UnderliesFerruginous Sands, Hythe Formation
OverliesVectis Formation, Weald Clay
Thickness55–60 m (180–197 ft) on the Isle of Wight, up to 18 m (59 ft) in the Weald
Lithology
PrimaryMudstone
OtherSandstone, Ironstone
Location
RegionEurope
Country UK
ExtentSouthern England

References

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