DAKYNS : THE GEOLOGY OF NIDDERDALE AND THE WASHBURN. 299 
Station, and thence runs into Thornton Beck below Shaw Mill. It 
is succeeded by a synclinal running from Blubberhouse Moor by 
Fewston, and thence by John of Gaimt's Castle down the gill in 
Haverah Park. This is succeeded by an anticlinal which branches 
out of the Beamsley one at Round Hill, and thence skirting the edge 
of the ordnance map 92° N.E. runs on to Harrogate. 
GLACIAL PHENOMENA OF WHARFEDALE BETWEEN BOLTON ABBEY AND 
KETTLEWELL. BY J. R. DAKYNS. 
With one singular exception the glacial drift in the basins of 
the Rivers Wharfe and Nidd, among the Carboniferous Rocks, con- 
tains no stones but such as may have come from the rocks cropping 
out at the surface in those basins. There are no foreigners. We 
know that the drift material has travelled southward and eastward, 
because boulders of Carboniferous Limestone are found to the south 
and east of any outcrop of that formation. Thus in the adjoining 
area boulders of Carboniferous Limestone have been carried south- 
ward across the Aire to the higher part of the Worth valley, and 
such have also travelled eastward down the Aire valley towards 
Leeds. There are very few glacial striae in Upper Wharfedale, 
because there are not many hard compact rocks fitted for retaining 
striae. Limestone is hard and compact enough, but it disappears so 
rapidly at the surface under the influence of rain water and becomes 
so fretted into fantastic shapes, that it does not long retain super- 
ficial markings except when protected from the weather by a covering 
of clay. One very good instance of this sort occurs between Coni- 
stone and Kettlewell. There I found, under a bed of boulder clay, 
Limestone Rock, beautifully grooved ; the grooves trended along the 
hillside bounding the valley of the Wharfe. The only other 
