298 
The American Geologist. 
Figure I. 
May, 1S90 
a. a. Impervious beds dipping towards center of basin, inclosing porous bed (6). 
A. Well near center of basin with artesian flow. 
B. Well on higher ground without artesian How, because located higher than the outcrop ot o. 
Figure II. 
A B. a b. As in Pig. 1. 
c. ' Breach in the continuity of the lower (a) impervious bed. 
Figure III. 
f-r 
E=£IZI 
T. Tertiary. i. Pliocene marl. 
C. Cretaceous. 1. Niobrara. 
Tr. Trias. 1. Red Beds. 
P. Permo-carboniferous. 
2. Miocene grit. 
3. Benton. 3. Dacotah. 
3. Saliferous horizon. 
[THE USUAL RELATIONS OF STRATA IN WESTERN KANSAS.] 
