Quart. Journ. Geol. Soc. Vol. LXIII, Pl. XXXV. 



from the crest of the Jurassic escarpment through the Vale of Aylesbury to the Chilterns and the Thames valley, 

 showing the profile of the dip-slope rivers. -The river Cherwell is to the west. 



CHALK ESC«RPM£ 



similar section from Edge Hill, across the Oxford plaln,to the Chilterns. -The river Cherwell is to the east. 



COTTESWOLO I 



from the valley of the Avon to that of the Thames, showing the Moreton watershed and 

 Stour and Evenlode whloh originate on It. 



profiles of the rivers 



Horizontal Scale 



