581 
the spar is converted to the same purpose. " Slickensides " 
occur very abundantly here, having mostly a JST. and S. 
direction ; some of them are on a large scale, covering a 
space of many square yards with a siliceous and striated 
surface. At Park Quarry the anticlinal is more manifest, 
being parallel to that of Thornton. These two axes are 
separated by the synclinal of Pinnow Pike, which is two or 
three miles across. 
Skipton Rock. — The strata have here been denuded so as 
to expose a considerable surface of limestone. Two subordi- 
nate axes are seen with the intervening hollow. The beds 
are frequently faulted in two directions, viz., in the line of 
the anticlinal, and also transversely. Near Draughton the 
limestone is much broken and strongly anticlinal, dipping 
under the grit on both sides. All the way from Skipton 
to Bolton Abbey the contorted beds occupy a range of low 
hills in the midst of a long valley, the slopes of which are 
shales capped with grit. 
Bolton and Blubberhomes. — Close to Bolton Bridge the 
anticlinal line crosses the Wharfe. Just opposite the Abbey 
a natural section shews the shales dipping "NJN.W. at an 
angle of 12°. On the Addingham road the same shales are 
found on the hill- side dipping S.S.E. at an angle of 17°. 
Between these two points the limestone may be seen as a 
range of rounded hills which lie in a line from Draughton to 
Beamsley, and may be readily distinguished from the grit 
and shale slopes by their conical form and verdant appear- 
ance. Near Blubberhouses, just on the edge of the moor, is 
a narrow " gill," with a grit edge on both sides, and strewn 
with grit boulders. Here the limestone re-appears, and is 
worked underground by adits. I have not succeeded in 
getting a section of the strata here. 
I have now described the main anticlinal lines of South 
Craven ; but although the contorted limestone does not come 
