15 ^ PROCEEDL\TGS COTTESWOLD CLUB 1916 
IV. {e) EXPOSURES ON THE WEST SIDE OF THE 
INLIER TO THE NORTH OF THE USK RAILWAY. 
Most of the Western side of the Inlier is obscured by 
Alluvium and Drift, and it is only in the bank of the Usk for 
700 yards above the Chain bridge, at a spot by the road to the 
West of that bridge, and near the Reformatory Schools, to the 
North of Little Mill, that any Silurian beds are visible. 
Near the Chain bridge, Ludlow beds are seen, in the left 
bank of the Usk, thrown into a set of gentle folds. They 
are sandy shales, with calcareous concretions. 
There is, however, another exposure near the river some 
300 yards further North, where there is an old line of workings 
running down the slope from Tump Farm to the river, and 
near the farm these show sandy shales, with calcareous nodules, 
but in the lowest working of all there are seen a few feet of 
hard encrinital Limestone. The exposure is a very bad one, 
and is very much covered with material which has slipped 
down from above. The Limestone appears to be dipping 
20° S.W., and so to underlie the Ludlow beds seen lower down 
the river. 
The fossils from these workings are very few, only an 
Orthis and Pkacops caudata having been found, but the re- 
semblance of the red crinoidal Limestone to the massive 
Wenlock Limestone of the Coed-y-paen anticline is very marked. 
If this is the Wenlock Limestone it cannot be overlying 
the Wenlock Shales to the East, for they dip to the North- 
North-East, and it must be considered as underlying the 
Ludlow beds lower down the river and with them to be faulted 
oh from the Wenlock Shales to the East. 
It has been mentioned that the lofty hill-side above the 
Usk on its Western side below the Chain Bridge is made of 
MTnlock Shales covered by Drift. This Drift extends to the 
West across the road which comes up from the Chain Bridge 
but about half-a-mile from the bridge is a cutting by the road 
which shows Sandstones with calcareous layers dipping 20° 
N.io°W., and tiiey contain Chonetes siriatella and Orthis 
lunata in abundance. This, therefore, is further proof of a 
