422 



DISLOCATIONS — ABBERLEY HILLS. 



Advancing from Ridge Hill and Callow Farm to this place, in two ridges trending 

 from N.N.W. to S.S.E., one of which dips 60° the other 20° to the east, the limestone 

 of the principal branch is suddenly wrenched round and split into a diverging fork, and 

 occupies a broken saddle ; the separated masses of which dip in opposite directions as 

 in the above wood-cut. It is instructive to observe that the mean direction, if prolonged 

 from the centre of these yawning masses, terminates precisely in a little boss of syenite 

 at the foot of Berrow Hill, and hence there can be little doubt that the direction of the 

 fissure was determined by the eruption of that rock, in a line proceeding from thence by 

 Kingwood Common, and the Noak, to Hill Side. In Tinker's Copse, Collin's Hill, and 

 Ankerdine Hill, the strata of the Caradoc sandstone form an irregular anticlinal, marking 

 the prolongation of this disturbance, whereby the impure limestone and shelly sand- 

 stones of Collins Green and Hay Copse are thrown over to the E.S.E., whilst the 

 Caradoc sandstone of Ankerdine Hill dips S.S.W. A glance at the map will show that 

 the Teme escapes through a great fissure, and at a point of extraordinary convulsion ; 

 for on the left bank, the Caradoc sandstone is heaved up into a lofty hill, throwing off 

 the Old Red Sandstone to the west ; whilst on the right bank the rocks of the Silurian 

 System, being denuded and invisible for a short distance, are covered by a thick mass of 

 conglomerate of the New Red Sandstone of Rosemary Hill. (See p. 53, and PL 29. 

 f.4.) 



When again met with, in the prolongation of this ridge to the south of the river 

 Teme, the Silurian rocks have resumed their natural positions ; the Ludlow formation 

 regularly overlying the Wenlock limestone, and passing beneath the Old Red Sandstone ; 

 and finally the regular order is still more clearly defined by the Caradoc sandstone 

 rising from beneath the other groups in Old Storridge Hill. (PI. 36. f. 5.) The con- 

 vulsions, however, to which the strata have been subjected are again very apparent, a 

 remarkable example occurring at Crew's Hill, between Alfrick and Suckley, thus : 



E. 



The arrows indicate the points to which the strata dip. N. 



W. 



The direction of the strata in this portion of their course is changed from north and 

 south, to a few degrees east of south and west of north. By this strike, each formation 

 successively impinges upon the main chain of the Malvern Hills, which trends from 

 north to south , and the result is such as might naturally be expected. As they approach 

 the syenite, the Caradoc sandstone is first thrown into vertical positions, then tra- 

 versed by small bosses and dykes of the syenite, as explained p. 419., and finally cut 

 out by the great mass of that rock. Next the impure limestone and grit, or upper beds 

 of the formation, striking upon the western flank of the syenitic hills, are not only ren- 



