THE YORE t)ISTRICT. fjl 



junction of the Cover with the Yore. The following are the 

 rarer plants of the dale : 



Astragalus glycyphyllos 

 Epilobium angiistifoliuin 

 Sedum villosiini 

 Cotyledon Umbilicus 

 Galium sylvestre 

 Salix phylicifolia 

 Ophrys muscife7-a 

 Allium Scorodoprasum 

 Allosorus crispus 

 Asplenium viride 



Lycopodium selaginoides 



Andrecea Rothii 

 Dicranum fuscescefis 

 Oligotrichum hercynicum 

 Ulota Df-uJHtiiondii 

 Tetrodontiimi Brownianum 

 Zieria julacea 

 Bartramia CEderi 

 Orthothecium intricatiun. 



As we have now reached the point at which Wensleydale is 

 usually considered to terminate, a brief general sketch of its 

 geology may suitably be here introduced. From Hawes east- 

 ward as far as Redmire we have the Lower Mountain Limestone 

 occupying the bottom of the dale, rather more than 200 feet of 

 its upper beds being altogether exposed. Over these are the 

 strata of the Yoredale series, at the upper part of the dale 970 

 feet in thickness, five thick bands of limestone with still thicker 

 interpolations of non-calcareous material, the strata answering 

 to each other upon the slope of the opposite hills from 

 south to north with but trifling difference in level. Along 

 the ridge of watershed from the head of Widdale eastward 

 to the head of Bishopdale the surface of the Upper or Main 

 band of the Yoredale limestones attains an elevation of from 

 1900 to 1950 feet. Between the head of Bishopdale and the 

 Wharfedale side of Great Whernside the summit of the series 

 sinks to 1700 feet, and its thickness becomes very much 

 diminished, principally by the obliteration of its upper beds. 

 In the immediate neighbourhood of Hawes we have the Main 

 Limestone at an elevation of about 1800 feet on the south side 

 and of about 1 700 feet on the north side of the dale ; and as we go 

 down the dale it declines gradually in level. It reaches iioo 

 feet on the east side of Penhill, 850 feet in Middleham Moor, 

 700 feet at Leyburn, and sinks to 400 feet at East Witton. And 

 above the strata of these two sets of Mountain Limestone beds 



Sept. 1888. 



