Grantham Formation
The Grantham Formation is a geological formation in England, which dates to the Middle Jurassic Aalenian age around 172 million years ago. It is composed of mudstones and sandstone, usually with abundant plant debris. It overlies the preceding Northampton Sand Formation and underlies the following Lincolnshire Limestone.

It is found from the River Humber to the Kettering/Peterborough area. 
Q736917
geological formation
Concept
Q500054
Middle Jurassic
MEDIA
Q300887
Aalenian
LOC
Q568683
age
Concept
Q6642424
mudstone
Concept
Q13085
sandstone
Concept
Q7057638
Northampton Sand Formation
LOC
Q6551283
Lincolnshire Limestone
Concept
Q550995
River Humber
LOC
Q984613
Kettering
LOC
Q172438
Peterborough
LOC
Q48797847
Grantham Formation
LOC
instance of
underlies
part of
instance of