■PHYSICAL AND GEOLOGICAL DESCRIPTION. 



19 



tracts of white cedar swamp, and of hard-wood or Umber 

 swamp. 



§ The surface is uniform, and but little elevated above 

 the level of the sea. The salt-marshes, indeed, are nearly 

 at the level of high-water mark. The sand beaches are 

 usually from 1 to 25 feet high, though some are higher ; 

 one or two on Seven-mile Beach were found reaching the 

 height of 35 feet. The upland, or fast land of the county, 

 is also very uniform. The highest ridges in the county 

 are not more than 40 feet high, and it is doubtful whether 

 any reach that elevation. The highest one measured, 

 which was that between the sea-side road and the marsh, 

 ten miles up from Cape Island, was a little under that 

 height. The ridge called Mount Pleasant, on the road 

 between Dennisville and Tuckahoe, is only eight or ten 

 feet above the surrounding country, and is probably not 

 more than twenty feet above high-wat«r mark.* The 

 slight variation in the surface of the upland will be seen 

 from the following table of heights, from the profiles of the 

 West Jersey Kailroad.f The line of the road, as sur- 



* Tidei. — The following table is taken from the Report of the Saperintendent of th* 

 TJ. S. Coast Survey for 1854. 



f For the use of these profiles, the Survey is indebted to the kindness of Gen. William 

 Cook,. Chief Engineer of the Camden ahd Amboy Railroad Company. 



