Yol. 56.] STRUCTURE OP THE MALVERN - AND ABBERLEY HILLS. 16] 



West Malvern (fig. 12, p. 158) ; for Prof. Hughes informs me that 

 the dip of the breccia appeared to be steeper than that of the Black 

 Shales, a circumstance which suggests that the junction of the two 

 beds is a fault. (Pigs. 12 & 13, pp. 158 & 159.) 



The northern termination of the thrust- plane cannot be made out, 

 owing to the lack of exposures. The fault evidently continues 

 north of Whippets Brook, undisturbed by the transverse dislocation 

 there, and possibly passes along the eastern side of Rough Hill, 

 unless indeed, as seems likely, it is cut out by an ordinary fault 

 letting down the purple beds on the east of that hill. One 

 of the faults seen on each side of the Archaean in fig. 11 (p. 157) 

 is doubtless continued northward, and probably terminates against 

 a transverse fault running south of Hill Farm. The beds of 

 Rough Hill are inverted, as seen in the road at the southern end of 

 the hill. Here a subordinate overfold affects the Tarannon Shales 

 (fig. 14). 



Fig. 14. — Section along the road south of Rough Hill. 



Wooihope Limestone 



[Length of section =about 50 yards.] 



b=Grey shales, with bands of limestone ~| m ai -i 



a=Purple shales, with bands of limestone j Tarannon Shales - 



Immediately south of this road, the Silurian rocks of Rough Hill 

 are separated from those of Cowleigh Park by a transverse fault 

 which displaces the Wooihope Limestone a little towards the west, 

 on the northern side of the fault. This fault is apparently a con- 

 tinuation of that inferred to the east of the two northerly Archaean 

 patches, and still follows the brook. The Wooihope Limestone 

 may be traced northward along the western flank of North Hill 

 towards Hill Farm, south of which it terminates against a transverse 

 fault bringing the grey May Hill Beds against both the purple and 

 grey May Hill Beds, and the Wooihope Limestone of Rough Hill. 

 North-west of Rough Hill the Wooihope Limestone, inverted at 

 Whippets Brook, assumes a normal dip. On the eastern side of 

 Rough Hill brown May Hill Sandstones dip about due east-north- 

 east. These beds probably occupy a position east of the fault 

 on the eastern side of the hill, and perhaps correspond to the 

 similarly situated brown beds seen east of the quartzite in Cowleigh 

 Park. 



Q. J. G. S. No. 221. m 



