778 b. hill and t. g. bonney on the 



thered bauds dip S.E. by E. or S.E. ; but it is very probable that 

 this is false bedding. Another knoll, close to the lane, shows a large 

 breccia, which has some appearance of dipping E.S.E. By the side 

 of the wood, by the west wall, about 100 yards from the lane, in a 

 lino with some outcrops in the field outside, Sharpley rock can be 

 traced within the wall of the wood, and all but up to contact with 

 the ash. Here also there is plainly a fault, as the two are side by 

 side. There is also a very small outcrop of similar rock just across 

 the lane, hedged round in the field. Here, again, similar lines of 

 weathering give an appearance of a dip to S.S.E. We cannot satisfy 

 ourselves that any bed hero dips S.W. according to the arrow on the 

 Survey map. We cannot at present decide whether these beds, 

 faulted here, as they undoubtedly are, agree with those of High 

 Towers or the Cadman breccias ; we lean rather to the latter idea. 

 The rocks seen on the banks of the old reservoir we have not ex- 

 amined. Professor Jukes describes them as similar to the quartzito 

 met with near Blackbrook toll-gate, which we will describe in the 

 next section. 



16. In this remaining section the presence of faults seems almost 

 a certainty. The ridge of High Cadman runs N.W. to Gracedieu 

 grounds. Four separate rock masses are exposed, the southernmost 

 of which has already been described ; but we do not feel certain that 

 they are equivalents. 



The large rocky mass which supports a tower (from which is a 

 fine view) shows divisional planes, apparently of bedding, dipping 

 W.S.W., at an angle of 25°. There is here a large bed of breccia 

 whose matrix is a green ash with a fow quartz grains, while the 

 included fragments are a pink felstone-looking rock, like some of 

 that on High Towers. Further N.W., along the ridge where stands 

 a small oratory with a tapering spire, the rocks are intensely altered: — 

 those on the west slope whitish and felspathic, with little quartz, and 

 small dark slaty-looking grains ; those on the ridge dark with many 

 granules of quartz. 



Not very much further, perhaps 200 or 300 yards, there is a 

 curious quarry, by the side of the road, just short of the small 

 triangle of lanes. The rock is mainly extremely indurated slate, 

 cleavage rather imperfect, seemingly much disturbed, with numerous 

 very sharply cut joints. At first sight a band of colour seems to 

 give a dip towards the hill. Examination, however, shows that this 

 appearance is due to decomposition along a line of jointing. The 

 side nearest the hill is a coarse grit ; and the junction between this 

 and the finer slate can be followed by close scrutiny, and shows a 

 dip away from the hill. Also we found on a spur of the central 

 mass, not quarried away, a bed of slate coarser than the rest, which 

 similar close scrutiny proved to have indeed a dip away from the 

 hill in a direction somewhere about W.S.W.,but also to be contorted 

 and compressed with extreme and abrupt flexures. 



A small quarry a few yards to the south of this contains a whitish 

 ashy grit. The rocks outcropping a short distance to the north, at 

 the back of a small school-house, are coarse agglomerates of great 



