^^^^' 55-] C02«'GL0:irEElTES OF THE LOWEK SEVERN BASIN". 123 



Permian calcareous conglomerates of both regions, save only the 

 Clent Hills district. They are found in greatest abundance in 

 Eand A^ of the Bowhills district, and in Bands B^ & C of the 

 Stour Valley and Warley-Barr districts, but are never very 

 common. 



Table III (facing p. 122) illustrates the general distribution and 

 comparative abundance of the chief lithological varieties of the rocks 

 which occur in these Middle Permian conglomerates. 



The fossils so far found in the limestone-pebbles described are 

 enumerated in Table lY (pp. 124, 125). Davidson's monograph on 

 the British Fossil Brachiopoda has been used in identifying them, 

 unless otherwise stated. 



IX. Geneeal Conclusions. 



All the rocks that have been mentioned occur in place in the 

 Midlands, within a reasonable distance of these Middle Permian 

 conglomerates, with one exception. This is the Carboniferous 

 Limestone, a geological formation which hitherto has not been met 

 with in the immediate neighbourhood of the Middle Permian areas 

 that have been described. 



The nearest point where the Carboniferous Limestone occurs is at 

 the Titterstone Clee Hills, 7 miles south-west of the Bowhills district. 

 But, so far as I have examined that limestone, there are few pebbles 

 in the Middle Permian that could be safely referred to it ; for, while 

 the latter are mainly dolomitic, all the rock of the Clee that I have 

 seen is apparently non-dolomitic. Carboniferous Limestone also 

 occurs in place at the AVrekin, 15 miles north-west of the Enville 

 district and 30 north-west of Warley. The Wrekin limestones in 

 at least a few localities are dolomitic, contain locally abundance of 

 chert, and in some respects they agree with the rock-fragments in 

 the Permian conglomerates. The drift, however, of all the material 

 composing the Permian calcareous conglomerates, except the Car- 

 boniferous Limestones, has been from the south and east ; whereas 

 the Carboniferous Limestones at the Clees and the Wrekin are to the 

 north and west. But the intermixture of the Carboniferous Lime- 

 stone-pebbles with the other material suggests a common source for 

 the two. Is it not possible that these pebbles also were derived 

 from the south and east, from a sheet of Carboniferous Limestone ? 

 Curiously enough, at the opposite ends of a line running north-east 

 and south-west through the regions described, from Ashby de la 

 Zouch into South Wales, we find the Carboniferous Limestone in 

 place — namely, at Grace Dieu on the north-east, and at the edge of 

 the South Wales coalfield about the same distance to the south-west. 

 In both these localities the Carboniferous Limestone is dolomitic. 

 If patches of this dolomitic limestone were in place at other points 



