NEW YORK. 



83 



Future generations may build dikes and reclaim them, but at present they are dismal swamps 

 without a single tree or shrub, and wholly impassable to either man or beast. The two hills which 

 rise abruptly m the salt meadow south of the Erie Railway and north of the Pennsylvania Railroad, 

 are called Big Snake Hill and Little Snake Hill. The large one is half a mile long and 200 feet high. 

 Both of these hills are outbursts of trap from between the underlying sandstone strata, similar to 

 the Palisade Mountain. 



105. Suff ern to Greenwood. Here is a long natural gap through the Laurentian Highland range or 

 Ramapo Mountains. Going west you go through a 2-4. Cambrian valley to Otisville. There is some 

 Trenton limestone at Greenwood furnace and Turner's, but nearly all the surface for 30 miles is 

 covered with Hudson River slates, the softer portions about Goshen forming a beautiful country. 



