FULLONIAN : CHIPPING NORTON. 247 
The Chipping Norton Limestone has proved a source of much 
perplexity, because it overlies the Clypeus Grit, which has usually 
been regarded as the uppermost division of the Inferior Oolite of 
the Cotteswolds. It has yielded few fossils, and some of these 
have Bathonian affinities.* On the whole we cannot separate 
this Limestone on stratigraphical grounds from the Inferior 
Oolite ; but it may be regarded as a passage-bed between that 
formation and the Fullonian. (See Fig. 92, p. 329.) 
It seems hardly necessary in this northern area to separate 
the Fuller's Earth clay from the Stonesfield Slate ; and both 
become incorporated with the Upper Estuarine Series, as we 
proceed from the neighbourhood of Chipping Norton eastwards 
and north-eastwards into Buckinghamshire and Northamptonshire 
In fact, in the sections previously described (pp.156, 159) at 
Sharpe's Hill and Swerford, we may note the incoming of beds 
that approximate in character to the Upper Estuarine Series. 
As the Upper Estuarine Series constitutes a stratigraphicaJ 
division that may include the Upper Fullonian, the Stonesfielct 
Slate, and the lower part of the Great Oolite, it will be more 
^convenient to describe the beds with the several subdivisions of 
the Great Oolite that occur in the midland counties and Lincoln- 
shire. 
* See E. A. Walford, Quart. Journ. Geol. Soc., TO!, xxxix. p. 237. 
