130 GEOLOGICAL SURVEY OF NEW JERSEY. 



very harsh and windy situations in which they grow has an 

 effect analogous to that of great elevation. Hence it is believed 

 that exposure and poor soil are entirely sufficient to explain 

 why the young trees are prostrate. 



A large part of the Pine, however, is coppice growth from 

 old stumps which have lost their vigor to a large extent, and 

 under the unfavorable surrounding are incapable of producing 

 anything but straggling sprouts. Furthermore, the trees, which 

 grow very slowly on the poor soil of the Plains, are killed by 

 fire before they have time to reach a large size. 



