From the Jurassic,Kimmeridgian.
Collected from Abingdon,Oxfordshire,England.
A nice big section of upper leg bone from a dinosaur,Derived from the Kimmeridgian in the the Devensian gravel pits in Oxfordshire.
There are four Dinosaurs known from the Kimmeridge clay
Dacentrurus armatus (Stegosaur)
Cumnoria prestwichii (Iguanodont)
Duriatitan humerochristatus (Sauropod)
Juratyrant langhami (Tyranosaurid)
In all honesty it would be impossible to give a definitive identification to this, as it was not in association with any other bones.and any museum will tell you the same thing,Without question it is Dinosaur, and i would be inclined to be considering Cumnoria as it looks the nearest,i would suggest it would benefit from more investigation.
The end has been cut ground and polished to display very nicely the large bone structure.
The entire specimen is loose from matrix and measures 114mm x 90mm.