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Horsehay Sand Formation

Coordinates: 51°56′34″N 1°20′15″W / 51.9427°N 1.3375°W / 51.9427; -1.3375
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Horsehay Sand Formation
Stratigraphic range: Bajocian-Bathonian
TypeGeological formation
Unit ofGreat Oolite Group
UnderliesSharp's Hill Formation, Taynton Limestone Formation
OverliesNorthampton Sand Formation, Whitby Mudstone Formation
Thicknessup to 7 metres (20 ft)
Lithology
PrimarySandstone
OtherMudstone, Siltstone
Location
Coordinates51°56′34″N 1°20′15″W / 51.9427°N 1.3375°W / 51.9427; -1.3375
RegionEurope
Country England
ExtentOxfordshire, Northamptonshire, Buckinghamshire
Type section
LocationHorsehay Quarry, Duns Tew

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

References

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