.§95.] 
485 
we might have perfect adjustment of tlie drainage on the side 
where the hard member is most resistant, and but little or no 
adjustment on the other. If, however, the resistant member on 
tlie latter side is more resistant than the underlying soft member, 
the development into a lowland and a highland belt will occur 
the same. A smaller stream entering the master stream from 
the side having the weaker resistant member may succeed in 
cai)turing the adjoining small streams before subsequents from 
the master stream reach them. 
Fig. o. Diagram showiui;- adjusteil drainage. 
These features are characteristic under the conditions assumed, 
and are persistent, at maturity, over the whole length of coastal 
plain furnishing the proper conditions. 
In applying this, now, to the question of the origin of Crow- 
ley's Ridge and the lowland along its western side, it will be 
necessary, in order to show that my interpretation is correct, to 
show that the features there exhibited are only parts of more 
or less continuous features of the same kind extendino- around 
