24 baker's north YORKSHIRE. 



North of the Yore the escarpment is much narrower than 

 in the neighbourhood of Doncaster and Tadcaster. It soon 

 rises to an elevation of 300 feet, with a conspicuous slope in an 

 eastern direction. It ranges nearly in a straight line past Well 

 and Nosterfield to a hill about two-thirds of a mile west of 

 Thornton Watlass and there the escarpment suddenly terminates. 

 From Watlass to Little Crakehall there is no trace of Magnesian 

 Limestone; it is either entirely swept away or else buried 

 beneath the thick beds of glacial gravel which overspread this 

 tract. It is laid bare again in the bed of the rivulet at Little 

 Crakehall, and again makes its appearance beneath a mound of 

 glacial gravel five miles further north by the side of the private 

 road from Bedale to Catterick, about half a mile from the latter 

 locality ; and is probably continued beneath the ridge which 

 extends in the direction of Tunstall. It occurs also under thirty 

 feet of glacial gravel on the right bank of the Swale about half 

 a mile below Catterick Bridge. In the flat country north of the 

 Swale and along the edge of the hills of Yoredale beds at 

 Middleton Tyas there are no traces of it, but it reappears in 

 a hill about half way between Newton Morrell and Cleasby, and 

 is again seen at Rennison quarry, near Eppleby ; and by the Tees' 

 side west of Piercebridge it forms a cliff beneath thirty feet of 

 glacial deposit. North of the Tees it forms a cliff at Coniscliffe, 

 and from this point northward through the county of Durham 

 the escarpment becomes much increased in width. In the south 

 of Durham it fills up the whole of the space from Hartlepool 

 westward to the North Eastern line of railway. It borders the 

 Durham coal-field on the south-east and becomes gradually 

 narrower as we proceed northward. About Sunderland and 

 Marsden there are excellent sections in the coast cliffs and it 

 finally ceases upon the coast a short distance to the north of 

 the Tyne. 



Taking the series as a whole as represented in the North of 

 England, its divisions were given by Professor Sedgwick as 

 follows, viz. : — 



