PERMIAN SERIES. 89 



locally conformed to it; so that, in fact, we shall do wisely to 

 adapt our classification to the region which specially engages atten- 

 tion, for local description and limited inference. In the case now 

 in hand there can be no hesitation in choosing to treat of the whole 

 series between the coal and the rhsetic base of the lias as one great 

 physical ' Poikilitic' series ; the method followed in all my works 

 till the year 1840. 



I propose to describe the products of this period in two geo- 

 graphical sections ; the first connected with the Vale of the Severn, 

 the other with the Warwickshire Avon, these being much different 

 in some respects. 



THE PERMIAN SERIES 



comes nowhere into the drainage of the Thames, and is hardly 

 found anywhere within the range of country represented on the 

 map (Plate I. in this volume), except in a narrow band of brecciated 

 or conglomerate rocks which cling to the east face of the Malvern 

 Hills, and form separate summits on the Abberley range. To 

 this peculiar rock I gave the title of Haffield Conglomerate c , from 

 a point south of Malvern where it is very conspicuous. I treated 

 it as the lowest part of the new red sandstone. It is now generally 

 regarded as a part of the Permian series of rocks. It is about 

 300 feet thick. 



Along the southern end of the Silurian tract, west of the Malvern 

 chain, this conglomerate extends, in a narrow band abutting un- 

 conformably against those rocks, which had undergone enormous 

 waste before it was accumulated. It is a mass of fragments more 

 or less rolled and cemented by fine red sedimentary matter. The 

 fragments are such as the neighbouring hills might supply. They 

 are often polished, almost as if glazed on the surface. It is but 

 slightly traceable along the eastern face of the hills till we pass 

 the northern end, when it reappears about Alfrick and Rosemary 

 rock. Along the Abberley Hills it is seen in Berrow Hill, 

 Woodbury Hill, and about the Hundred House, and at points 

 farther north. % In this district it contains rock fragments which 



Memoirs of the Geological Survey, vol. ii. pt. i. 



