330 STKATIGRAPHICAL GEOLOGY 



possible equivalent of the French Autunian. They can hardly be 

 newer than that. 



Where fully developed this Midland Permian consists of three 

 members or divisions as below. 



Feet. 



3. Upper (or Enville) marls . . .100 to 150 

 2. The Trappoid Breccia . . . . 50 to 450 

 1. The Conglomerate Group . . .200 to 330 



500 to 800 



The thicknesses given are those found in the typical districts 

 of Shropshire and South Stafford. When followed southward the 

 conglomerate group thins out and the marls are overstepped by 

 the Trias, only small patches of the breccia being seen at intervals 

 below the latter. 



This Permian Series follows the eastern border of the Coal- 

 measures through Shropshire and Worcester, passing southward 

 on to the Silurian rocks of the Abberley and Malvern Hills. To 

 the eastward it borders the southern half of the South Stafford- 

 shire coalfield, but does not extend to its northern extremity. 



The Midland Permian, as above restricted, attains its fullest 

 development in Shropshire, and is well exposed in the neighbour- 

 hood of Enville on the Staffordshire border (see Fig. 107). Another 

 typical district is that of the Clent Hills in Staffordshire, where the 

 trappoid breccia attains its greatest thickness, but the upper marls 

 are not seen, being presumably concealed by the overstep of the 

 Bunter pebble beds (Trias). 



The following account refers more particularly to the Enville 

 district, and has been compiled from a paper by Mr. W. W. King, 2 

 who has made a special study of that area. 



The Conglomerate Group. This consists of soft red sand- 

 stones and red marls with three interbedded bands of calcareous 

 sandstone and conglomerate, the latter consisting of various pebbles 

 embedded in a sandy matrix, which is cemented by carbonate of 

 lime. The second of these bands is the thickest, being sometimes 

 a massive conglomerate 75 feet thick, and sometimes including 

 lenticular beds of red sandstone with a total thickness of 150 feet. 

 Both conglomerates and sandstones thicken to the north-west and 

 become thinner to the south-west. In the Clent Hills this group 

 is represented by red marls with three bands of sandstone and 

 compact limestone or cornstone, without any conglomerate, but 

 containing small fragments of the older rocks. 



The nature of the pebbles varies considerably in different parts 

 of the district. Thus in Shropshire about half the pebbles consist 



