By Arthur Vaughan, Esq., B.A., B.Sc., E.G.S., and J. W. 
Tutcher, Esq. 
HE district we have examined extends from Wills- 
bridge on the north to a mile below Burnet on the 
south, and from Keynsham on the west to Kelston Station 
on the east. Our attention has been devoted almost exclu- 
sively to the rocks of Lower Lias age ; the beds immediately 
above and below are, at the present time, nowhere very 
clearly exposed, so that only their general character can be 
made out. 
The beds immediately below can be imperfectly seen in 
the cutting on the Midland Railway just north of Bitton 
Station. This section is described by Moore ^ and exhibits a 
normal sequence, through the Bhetic shales, down into the 
Keuper marls. 
The following is a broad summary of the general geological 
structure of the Keynsham area. The Lower Lias, with the 
underlying Rhetic shales and Keuper marls, rests quite uncon- 
formably upon the Coal Measures below; this capping of 
newer rocks is nowhere very thick, and the older rocks 
appear at the surface in broad areas both to north and south. 
To the north we have the Coal Measures of Brislington and 
^ Q. J. G. S., vol. xxiii. 
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