240 



DISLOCATIONS OF THE SILURIAN ROCKS. 



on one side, the Caradoc on the other, without believing that the fractures of the Silurian 

 rocks were intimately connected with those eruptions. This subject will, however, be 

 further illustrated in the sequel. 



In addition to the deep fractures which have become river gorges, each ridge is 

 fissured, both longitudinally and transversely, by a number of minor faults, which are 

 indeed so common in all ancient rocks, that their existence would scarcely be worth 

 noticing, did not many of them show the manner in which they have become the seats 

 of springs and small streams, as will be detailed in the ensuing chapter. 



By throwing the eye over the map, the reader may obtain some notion of the fre- 

 quent solution of continuity between the ends of the strata. A few of these have been 

 laid down on the map, to explain the extent to which the formations have been affected, 

 in one of the least disturbed of the districts over which the Silurian System ranges. 



I would further only remark, that beyond the south-western extremity of the axis of 

 elevation of the Caradoc sandstones at Corton, the formation of the Ludlow rocks, 

 though without any traces of Aymestry limestone, is repeated in the hills of Hoptown, 

 Brampton Bryan, &c. Some of these are elevated undulating masses, which fold over 

 and pass under the detached fields of Old Red Sandstone of Norton on the south-west, 

 and of the forest of Clun on the north-west. In others, however, the beds are thrown 

 up at very high angles by powerful lines of dislocation occupying more abrupt posi- 

 tions than any deposits in the immediate vicinity of Ludlow, as for example in Hopton 

 Titterill, where they are vertical, with a strike from north-east to south-west. This 

 remarkable upcast (the effect probably of the outburst of the Caradoc,) serves to 

 explain how the Old Red outlier of the forest of Clun has been severed from the main 

 body of that system. (See pp. 190—193.) Further accounts of the dislocations by 

 which the strata of this age have been affected in their prolongation to South Wales, 

 will be found in the pages in which the structure of these tracts is described, and 

 usually following, as in this case, the description of the trap rocks of each district. 



" Outliers of Ludlow Rocks." 



" Tinker's Hill and Caynham Camp" ci Linley and Dean," near the Iron Bridge. 



A narrow outlier of these rocks rises from beneath the Old Red Sandstone, one mile and a half 

 south-east of Ludlow. It is about two miles in length from north-east to south-west, and is 

 parallel to the main direction of all the Silurian deposits. The Lutwiche Brook, a tributary of the 

 Teme, flows through a gorge which bisects this little ridge, the south-western half being called 

 Tinker's Hill, the north-eastern Caynham Camp, their height being respectively 500 and 600 feet 



