204 PROCEEDINGS COTTESWOLD CLUB 191 1 



In a quarry near Lower Swell' bed 5 of the railway-cutting 

 section appears to have become replaced by limestone ; while 

 above are marls that weather into a tough greenish-brown clay, 

 which seem to represent bed i in the railway-cutting, but 

 may be beds 2, 3 and 4 as well. In the marls exposed in this 

 quarry is a limestone-band, sometimes crowded with gastropods 

 which, I think, is correlative with the Lower Nerincea-Bed in 

 the Neaeran Beds of the Chipping-Norton district. If this is 

 the case, then by the test of relative stratigraphical position, 

 the lower two-thirds of the Lower Fullers' Earth would appear 

 to be equivalent to the Chipping-Norton Limestone, and the upper 

 third to the Neaeran Beds. This, of course, is speaking approxi- 

 mately, and in the light of the knowledge at present possessed. 



I once noticed in the quarry near Lower Swell a peculiar 

 deposit of sand, which I assigned to a position between the 

 Chipping-Norton Limestone and the clay-beds. Mr Walford 

 noticed a similar deposit on top of the Limestones (bed 7) in 

 the railway-cutting. A similar deposit occupies a like strati- 

 graphical position in many of the quarries in the Chipping- 

 Norton district. 



Thus on stratigraphical grounds, it would appear that the 

 Lower Fullers' Earth in the Chipping-Norton district is mainly 

 represented by the Chipping-Norton Limestone, and the fact 

 that this hmestone at the Oakham Quarry (page 228) has yielded 

 a specimen of Oppelia, probably 0. fusca, shows that this is so. 



Chipping-Norton Limestone. — This hmestone spreads far 

 and wide over the Chipping-Norton District, and has long been 

 known for the occurrence in it, or in the immediately superin- 

 cumbent clay-beds of the remains of the giant saurians of the 

 genus Cetiosaurus.' 



The name " Chipping-Norton Limestone " was first used by 

 the late W. H. Hudleston in 1878,^ and he evidently intended 

 it to apply to the whole of the limestone that intervenes 

 between the Clypeus-Grit and the present Neaeran Beds, or 

 Great Oolite deposits, as the case may be, in the neighbourhood 

 of Chipping Norton, where it is extensively quarried for dry- 

 walling or for mending the local roads.'' 



1 Proc. Cotteswold Nat. F.C., vol. xvi., pt. i (1907), pp. 24 and 25. 



2 Phillips, " Geology of Oxford, etc." (1871), pp. 164, 245 : Proc. Geol. Assoc, vol. v., No. 4 

 (1877), p. 185. 



3 Proc. Geol. Assoc, vol. v., No. 7 (1878), p. 384. 



4 " The Jurassic Rocks of Britain, etc" vol. iv. (1894), p. 149. 



