Sandrock Formation

The Sandrock Formation is a geological formation in England, part of the Lower Greensand Group, it is found on the Isle of Wight and in the northern part of Swanage Bay. It consists of a cyclic rhythm of sandstones, siltstones, and mudstones.^[1]

Sandrock Formation
Stratigraphic range: Aptian–Albian PreꞒ Ꞓ O S D C P T J K Pg N
Type	Geological formation
Unit of	Lower Greensand Group
Underlies	Monk's Bay Sandstone Formation
Overlies	Ferruginous Sands
Thickness	up to 70 metres (230 ft)
Lithology
Primary	Sandstone, siltstone, mudstone
Location
Region	Europe
Country	United Kingdom
Extent	Isle of Wight, Dorset
Exposure of the Sandrock Formation on the southern half of the Isle of Wight