336 R. I. MuRCHisoN, Esq. and H. E. Strickland, Esq., on the 



Worcestershire, seems to distinguish this upper bed of sandstone from the lower 

 one which occurs at Warwick. This sandstone is also more variable in its 

 texture than that of Warwick, for though hand specimens may be found much 

 resembling the latter in appearance, yet in some of the beds a coarse grit pre- 

 vails, similar to that of Burge-hill. 



The best place for studying this sandstone in Warwickshire, is at Shrewley 

 Common, about four miles north-west of Warwick, where it occurs near the 

 summit of an extensive platform of red marl. The great thickness of this un- 

 derlying marl, is evident at Hatton Hill, which is wholly composed of it. At 

 Shrewley Common, the sandstone is exposed by a tunnel, on the Birmingham 

 and Warwick canal, and in some adjacent quarries. The following section 

 is visible : 



Red marl 30 to 40 Feet. 



Sandstone and green marl 20 — ■ 



Red marl 10 — 



70 

 The stratification is very nearly horizontal. 



The sandstone is obtained in large slabs and removed to Warwick, where 

 it is used for tombstones and other purposes. It is whiter than the Warwick 

 sandstone, and considerably harder, thinner-bedded, and closer grained. Small 

 nodules of ironstone occasionally occur in it, and their great hardness gives 

 much trouble to the stonemason. Ripple marks and septaria-like veins of 

 sandstone are very abundant; and this locality is further distinguished by the 

 occurrence of footsteps of animals, bivalve shells, and teeth of fishes, which 

 will be described in the sequel. 



The same beds are repeated at Rowington, where a deep cut on the canal 

 exposes the following strata : 



White sandstone and green marl 20 Feet. 



Red marl 40 — 



GO 



The stratification horizontal. 



At the foot of the hill south-east of Knowle, the same stratum of sandstone 

 appears, and, though not exposed by quarries, may be seen in one of the locks 

 on the canal. It is surmounted by red marl, which dips beneath lias, about a 

 mile further north*. 



* The outlier of lias, at Knowle, is about a mile and a half in length by half a mile broad. It 

 was worked for limestone a few years ago at Waterfield Farm and Copt Heath, and the shafts of 

 the workings still remain. The discovery of this outher is due to Dr. Lloyd, of Leamington, to 

 whom we are indebted for much valuable information on the geology of Warwickshire. 



