The American Geologist, Vol. XXXII. 
Plate XXIV. 
Fig. A. — Back-set Bedding in Delta-Plain. 
H^^-^^^^^^H 
^ JflE? | 
_ 
K3f \^ 
..■v • 
1 
, 
* s - 
- 
\ * . 
' 
\ 
it^vZsr^ ¥ '^d 
' ! w. 
Fig. B.— Truncation of underlying Strata by those superimposed, in the Process of Down-Sliding. 
