Mr Hitgh Miller on River- Terracing. 



289 



curves that have made good their way for considerable dis- 

 tances; but although so easy to define theoretically, it is 

 difficult to identify. It is the lateral terrace par excellence, 

 and may be likened to the planation of a cutting-machine 

 passing along the side of a held, and taking out strips of it. 

 Its formation may be illustrated by Fig. 14. A is a river- 



yf Section I 



Live 

 Sec lion 1 



Fig. 14. 



Part of the North Tyne, near Wark, illustrating the growth and destruc- 

 tion of River Terraces. 



A, Curve, shifting down stream ; B, Haugh forming behind it ; C, Sand- 

 bank (1865) now (1883) being added to B ; D, Tributary streamlet now 

 broken in upon at that point ; 1, 2, Terraces below A ; 1', Lower Terrace 

 replacing them, and 2', probable selvage of 2. The other figures denote 

 typical points of elevation above river in feet. I, II, Sketch sections ; Gra., 

 Gravel; B.Cl., Boulder Clay. 



Horizontal Scale— 3 inches = 1 mile. 



curve hitherto in slow progress down stream ; 1 and 2 are 

 step-like terraces on the bank further down the river, which 

 it destroys as it advances. The large flat B is a haugh at a 

 lower level (as will be observed from the measurements given 



VOL. VII. T 



