186 
altitude above 
1oooft 
limestone 
| o 
\ ‘] red sandstone 
MB serpentine| (Triassic) 
! ; 
\ WHE diabase 
\ 
' 
lic. 3. Geological and physiographic features of the vicinity of New 
York showing: A. Region above 1000 ft. altitude characterized by northern 
(Canadian) plants. B. Pine barrens of New Jersey and Long Island. C. 
Limestone and serpentine areas. D. Red sandstone and diabase. 
