On a Section of Selsley Hill, by EK. Wircuety, F.G.S. 
It is well known to most Geologists that the Inferior Oolite, 
which forms so conspicuous a feature in the long escarpment of 
the Cotteswolds, attains its maximum development in the 
neighbourhood of Cheltenham, and gradually becomes thinner 
as it is traced along the escarpment in a south-westerly 
direction. Some of the beds however form exceptions to this 
arrangement. For instance, the Lower Limestone is nearly of 
the same thickness throughout the Cheltenham and Stroud 
areas, and the White Oolitic Limestone near the top of the 
formation gradually developes in thickness towards the south- 
west and is considerably thicker near Bath than in the north- 
eastern Cotteswolds. 
The proceedings of the Club contain several Sections of 
Inferior Oolite, but they are for the most part confined to the 
Cheltenham area. I may mention Dr Wright’s Section of 
Cleeve hill, in the 4th Volume, repeated with that of Leck- 
hampton, in his paper on the Correlation of the Jurassic Rocks 
of the Céte D’or with those of Gloucestershire, in the 5th 
Volume, my Section of Stroud hill, in the 7th Volume, and 
Mr Lucy’s Section of Birdlip, in the last Volume. These 
appear to me to require supplementing by a Section of 
one of the hills which form the escarpment in the Stroud 
area. Stroud hill is several miles to the south-east, and the 
beds there do not present so much attenuation as at Selsley, 
and are not therefore so available for correlation with those in 
the Cheltenham area, but Selsley is peculiarly suitable for the 
purpose. It has suffered less from denudation than any of the 
