PLATE 12 
N. Y. STATE MUSEUM BULLETIN 168 
A portion of the Islip (U. S. G. S.) quadrangle showing typical Long 
Island topography. Note the distinct hills (of glacial morainic origin) on 
the north, the perfect plain only very slightly stream-dissected and with 
very gentle seaward slope, and the long beach (built by wave action) in- 
closing the shallow bay with its many swampy islands. Scale, about 2 miles 
to the inch. 
