EDEN VALLEY AND YORKSHIRE-DALE DISTRICT. 61 



Duerly Beck, the writer found unmistakable drift, containing gla- 

 ciated fragments of the Yoredale limestones, high up on the Mill- 

 stone Grit of the watershed. Amongst the drift there were not only- 

 stones from the highest of the Yoredale limestones, easily recogni- 

 zable by its encrinital character, but also fragments of some of the 

 dark grey limestones that occur at much lower elevations. The 

 value of this piece of evidence is great, as demonstrating that part of 

 the ice that environed Ingleborough in so remarkable a manner came 

 from still further north than the line of high ground between the 

 Yore and Wharfe. 



On Wetherfell, about two miles to the N.N.E. of the place where 

 the up-carried drift was found on Dod Fell, Mr. Dakyns, of the 

 Geological Survey, found scratches ranging south-easterly at an 

 elevation of nearly 1800 feet above the sea. These afford another 

 proof that the great ice-sheet flowed across the head of Wensleydale, 

 and that its line of departure must therefore be still further to the 

 north. The remaining scratches on the south side of the line of 

 diamond-shaped dots on the map do not help to prove much ; those 

 in the low ground conform, as they usually do, to the direction of 

 the part of the valley wherein they occur. The scratches on Sails, 

 again, do not help much to show which way the ice moved ; and the 

 same may be said of those on the east side of Baugh Fell. There 

 seems, however, to have been a line of ice-shedding nearly coincident 

 with that between the head of Garsdale and the part of "Wensleydale 

 known as Lunds : to the north-east of this line the striae trend to the 

 south-east ; and on the Garsdale side the lower striae conform more 

 or less to the direction taken by the river Clough. On the top of 

 Baugh Fell several well- striated rock surfaces occur at different 

 elevations between the 2100- and 2200-foot contours ; their general 

 direction is west-south-westerly, with a few pointing nearly due 

 west. Scratched-stone drift occurs on the north side of the Fell up 

 to 2100 feet above the sea. In this case the glaciation appears to 

 have been very slight, as, in one or two instances, not represented by 

 arrows upon the map, the ice seems to have done little else than 

 plane off the crests of the ridges between the ripple-markings on the 

 surface of some of the blocks, leaving the hollows in nearly their 

 natural state. Other instances seem to show that the glacial action 

 has only shorn off the upper parts of the quartz pebbles that weather 

 out on some parts of the rock, leaving flattened surfaces that show 

 very minute striae preserving a generally parallel direction over 

 large slabs of rock. These, however, may be partly due to the easy 

 separation of the slabs of rock along the bedding-planes, in conse- 

 quence of the small thickness of preglacially weathered rock that 

 the brief stay of the ice at these high elevations enabled it to re- 

 move. The scratches represented upon the map are very well 

 marked, and may be found easily enough by any one who cares 

 to look for them. 



Passing now to the drifts about Rawtha bridge, and those that 

 occur just to the north of the Bluecaster diorite, we find unmis- 

 takable evidence of the northward transportal of the drift, and 



