YorksJiii'c Xafuralisfs cit lugleton. 235 



Two large faults, the North and South Craven ones, intersect 

 the southern part of the area, running- from N.W. to S.E. 

 These, again, cause complications, though the evidence of 

 them is very clear ; in fact, one cannot call to mind any part of 

 our county showing the results of great faults more clearly 

 than this. 



The Carboniferous rocks do not present much difficulty in 

 themselves. The lowest beds are well seen in many places, 

 resting almost horizontally upon the edges of the older rocks. 

 In some cases the base is formed by a conglomerate, which in 

 others is absent. Where it is present it is very coarse, 

 gradually getting finer in the ascending section, until, through 

 the stages of lines of pebbles, then traces of quartz grains, it 

 passes up into the Great Scar Limestone, here about 600 feet 

 thick, and often very fossiliferous. 



Such are the salient features of the district recommended 

 for the day's work of the Geological Section, and no wonder 

 such a variety of interest attracted a large number of members 

 and associates, geologically inclined, and armed with a fearful 

 and wonderful selection of implements. They were divided 

 into two parties, according to time of arrival, and it was 

 gratifying to see so many of the geological officials of the 

 L'nion present. They included Messrs. Cosmo Johns, F.G.S., 

 and the writer ; president and secretary respectively of the 

 section ; Messrs. J. H. Howarth, J. P., F.G.S,, and W. 

 Simpson, F.G.S. , of the Boulder Committee; Messrs. E. E. 

 Gregory, J. J. Burton, and Thos. Sheppard, F.G.S., repre- 

 senting other committees. The earlier party was under the 

 guidance of the writer, the later one under that of Mr. W. 

 Robinson, both parties following the same route, and joined at 

 the granite quarry. 



Jenkin Beck was visited first. Both branches of the Craven 

 Fault cross this. The line of the South one was seen very 

 clearly, bringing down Coal Measures against the Carboniferous 

 Limestone. A bed of sandstone, much shattered, belonging to 

 ihe former, was seen adjacent to beds of the latter. The line 

 of the North branch was less distinct, but still perceptible, 

 throwing down the Carboniferous Limestone against beds of 

 the Coniston Limestone series. Passing out of the gill, the 

 way was taken over Storrs Common, where some large blocks 

 of Silurian rocks, no doubt ice-borne, were seen resting on the 

 Carboniferous Limestone. The view from here was extensive 

 and most interesting, giving one a splendid idea of the results 



1906 July I. 



