195 



A specimen from the pits of Mr. Hoffman, one mile and a half east 

 of Barnesborough, Gloucester county. 



In its native condition, liiis marl is of a rich green, rather 

 lighter than the medium tint. The greensand which it yields by- 

 washing, is of a somewhat darker colour, but uniform. The 

 granules are moderately large, and with very few intermingled 

 grains of common siliceous sand. Minute grains of carbonate of 

 lime occur in it, but in trivial proportion. 

 100 parts, afford : 



Greensand, - 85-58 



Clay, - - 13-42 



Quartzose sand, - 1-00 



100 00 



J specimen from Jonathan Riley's pits, at Woodstown, Salem county. 



The marl of this locality is of a dark dull greenish gray, with 

 a tint of brown. This colour is owing to the ferruginous character 

 of its clay. It is almost entirely free from quartzose sand, but 

 contains a very small amount of carbonate of lime in minute 

 granules. When washed, its greensand is of a very deep tint, 

 nearly black ; some of the grains, however, are brownish. 

 100 parts, afford : 



Greensand, - 88-28 



Clay, - - 11-72 



Quartzose sand, - none. 



Carbonate of lime, a trace. 



10000 



A specimen from the farm of James Smith, Mannington Hill, Sale?n 



county. 



This marl has a rather green colour, of the average depth of 

 tint. When washed, the greensand is of a rich dark green. 

 100 parts, afford : 



Greensand, - 88-80 



Clay, - - 10-20 



Quartzose sand, - 1-00 



10000 



