kkndall: the (;lacikk lakks of clkveland. 
•21 
of the head of Newton Dale it is joined by the valley of EUer 
Beck (Plate IX.) on its eastward side (Plate VIII.). Eller Beck 
flows in a normal valley until it reaches Newton Dale, when it 
turns sharply to the north and flows through a V-shaped valley 
to join the Murk Esk. A comparison of Eller Beck valley 
with the Fen Bogs channel (Fig. o) shows that the latter is far 
too large to have been cut by such a stream as Eller Beck, and 
belongs to a type of channel wliolly different from that which 
such a stream would produce. 
Contour Map of Pickering Delta 
For tw() and a half miles of its upper course below Fen 
Bogs (Plate VIII.) there is no continuous stream, but bog with 
an occasional strip of running water. Ne\\i:on Dale thus shows 
the characteristics of a true glacier-lake overflow. It must have 
carried a large stream during the time that all the drainage of 
Northern Cleveland and Eskdale Lake was being discharged 
