Horsehay Sand Formation

The Horsehay Sand Formation is a geological formation in England. Part of the Great Oolite Group, it was deposited in the Bajocian to Bathonian stages of the Middle Jurassic, the lithology consists of weakly cemented sand and sandstone, with thin interbeds of mudstone and siltstone. Rootlets and lignitic debris are common.[1]. It is the lateral equivalent of the Chipping Norton Limestone and the lower part of the Rutland Formation

Horsehay Sand Formation Stratigraphic range: Bajocian-Bathonian PreꞒ Ꞓ O S D C P T J K Pg N ↓
Type	Geological formation
Unit of	Great Oolite Group
Underlies	Sharp's Hill Formation, Taynton Limestone Formation
Overlies	Northampton Sand Formation, Whitby Mudstone Formation
Thickness	up to 7 metres (20 ft)
Lithology
Primary	Sandstone
Other	Mudstone, Siltstone
Location
Region	Europe
Country	England
Extent	Oxfordshire, Northamptonshire, Buckinghamshire
Type section
Location	Horsehay Quarry, Duns Tew

References

1. "Horsehay Sand Formation". BGS Lexicon of Named Rock Units. British Geological Survey. Retrieved 31 July 2018.