548 



PKOF. G. A. LEBOTJR AND DE. J. A. SMYTHE ON [Aug. I906, 



conglomerate, containing pebbles derived from the Mnssel-Band, 

 has been forced under the Mussel-Band itself (see fig. 8, p. 538). 



In the section from M to N, the pebble-bed has been torn to 

 shreds, and is mixed up with pieces of shale and sandstone, 

 oriented at every conceivable angle. Here too, as has already 

 been pointed out, the movement has extended several feet above 



Fig. 15.— (See p. 647.) 



NORTH 



SOUTH 



(a) Plan showing ridges. 



X 



X * 



(b)Section 3 yds. from Cliff and parallel to it. 



. .T.R.S. ' \ . * \ 



: x . . . ■ 



". x ' 



(c) Section parallel to last,but beneath the Cliff 



(d) Section across the Cliff 

 where there are no ridges 



(e) Section across the Cliff 

 where there is a ridge (at.K) 



the unconformity, as is shown by the presence of small faults 

 bounded by clay-partings. Where these faults occur, the rock- 

 material is often indescribably shattered and mixed. Where the 

 thrusting coincides least with the unconformity, there the moving 

 mass was least resistant, or in other words most shaly. 



As further evidence of the thrust, it may be added that the 

 master-joints of the Upper Series are never continued in the Lower. 



