JOWETT AND MUFF : GLACIATION OF BRADFORD, ETC. 233 
liave stood along the edge of the Stony Ridge escarpment. The 
overtiow of the Harden Lake at this period took place by the 
Salter Royd channel, and perhaps later between the ice-front 
and the scarp near Nor Farm at 770 feet. 
At a still later period the Harden Lake discharged through 
the gap near Coplowe Hall (660 feet), whilst the Noon Nick 
channel was deserted and the ice-margin stood along the lower 
slopes of the Stony Ridge escarpment, the overflowing waters 
escaping by the channels at Shipley Moor Head. At this stage 
the glacier probably terminated at the Tong Park moraine. 
If there was any lake in the Bradford basin it must have dis- 
charged through crevasses in the ice, which would doubtless 
become effective when the glacier became thinner and shorter. 
The Outlets of the Oxenhope Lake. — The shrinkage of the 
ice from the ridge east of the Worth basin opened an outlet at 
Cuckoo Park, situated about a mile north of the Trough Lane 
channel (Fig. 1). This is a streamless valley with an intake- 
level of about 960 feet. On the watershed, where it coincides 
with a hne of fault, it is shallow. The valley, however, deepens 
rapidly towards the east, and runs in a winding course through 
a thick bed of Millstone Grit. It terminates at the 775-foot 
contour, just below the bridge on the main road from Keighley 
to Halifax. In the lower part of its course it holds a small 
stream, which rises in springs 300-400 yards south of the valley. 
At its mouth a deposit of gravel and sand, with an irregular 
sloping surface, spreads down the slope of the hill towards 
Cullingworth. On the sides of Manywells Beck the gravel is 
in places more than nine feet thick. The stones seem to consist 
entirely of sandstone and grit, generally somewhat decomposed ; 
they are water-worn, but not as a rule well-rounded. 
The next overflow on the retreat of the ice took place by 
the streamless valley near Flappit Spring, situated about half 
a mile to the north of the last. This channel runs as a deep, 
steep-sided valley, right up to the watershed, where it ends 
suddenly in a steep wall of grit. There is barely any notch 
through the watershed (915 feet). The valley was doubtless 
eroded chiefly by the cutting back of a waterfall, and we may 
suppose it to have been deserted before the divide was completely 
