GEOLOGY. 13 



In Ingleborough the section is similar to this last, but the upper 

 limestone is about 200 feet higher than in Penyghent, and con- 

 siderably thinner. It forms a scar about 30 feet in thickness, 

 which may be seen to advantage on the crest of the Ingleton 

 or western slope of the mountain. 



From Hawes, proceeding towards the east down the Yore- 

 dale valley, we have on the south side of it the Underset lime- 

 stone at an elevation of 1,565 feet forming the summit of 

 x\ddlebrough, and along the line of drainage which forms the 

 southern boundary of the Riding, the Main limestone maintain- 

 ing an elevation of about 1,900 feet from Widdale Fell along 

 Cam Fell as far east as the head of Bishopdale. But between 

 this point and the Wharfedale slope of Great Whernside, where 

 the lower limestone i^ 1,400 feet high, the Yoredale series has 

 declined in level upwards of 200 feet by the upper limestones 

 having become completely obliterated, and the non-calcareous 

 interpolations between the lower beds having also vanished 

 almost entirely, as the following section shows : — 



Feet. 



Plate 84 



Limestone with partings of plate iii 



Plate 4 



Dark limestone 78 



277 feet. 

 This is the section of the Yoredale Rocks on the Wharfedale 

 side of Great Whernside, but on the Coverdale side of the 

 mountain and at the summit of drainage between Coverdale 

 and Wharfedale the upper limestones may be seen making their 

 appearance and rapidly attaining a considerable thickness, so 

 that on the west side of Coverdale the Main limestone is from 

 30 to 40 feet thick, and these, with the non-calcareous bands 

 which are interpolated between the lower beds, in the space 

 between the Wharfedale side of Great Whernside, and Star- 

 botton, a distance of only three miles, swell the series from 

 227 to 510 feet. Along the whole length of Coverdale, a dis- 

 tance of 15 miles, the non-calcareous beds above the middle 



Jan. 188S. 



