Northampton Sand Formation

Northampton Sand Formation Stratigraphic range: Aalenian 174–170 Ma PreЄ Є O S D C P T J K Pg N ↓
Dragline opencast mining of the ironstone at Weldon, Northamtonshire.
Type	Geological formation
Unit of	Inferior Oolite Group
Sub-units	Corby Ironstone Member, Duston Member (formerly Variable Beds)
Underlies	Grantham Formation, Rutland Formation, Horsehay Sand Formation
Overlies	Whitby Mudstone Formation
Lithology
Primary	Sandstone
Other	Ironstone, Oolitic Limestone
Location
Region	East Midlands
Country	England

The Northampton Sand Formation is a Middle Jurassic geological formation which is placed within the Inferior Oolite Group. It was formerly worked extensively in Northamptonshire for its ironstone. Dinosaur remains are among the fossils that have been recovered from the formation, although none have yet been referred to a specific genus.