Quart. Jovtrn. Geol. Soo. Vol. LXV, PI. XXXI. 



Fig.i- Section showing the thalweg of the beheaded Artlegarthdale and its tributary valleys. 

 [Scales: Vertical, 6 inches = I mile; horizontal, 3 inches = 1 mile.] 









N. by W. 





Stone Gill 



RAVENSTONEDALE 



- 



1 its tributary valleys. 

 .] 









Fig.2.- Section along the watershedding line west of Bowderdaie. 

 [Scales: Vertical, 6 inches = 1 mile; horizontal, 3 inches = 1 mile.] 



