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brownish mass ; the efficacy of this upon the soil is found to be 

 very great. Capping this upper layer, the diluvium contains a 

 bottom band of very ferruginous cemented sand and gravel, a 

 foot and more in thickness. 



The extensive range of meadows in which these exposures of 

 the strata occur, meets the meadows of the Rancocus about two 

 miles above the limit of the tide, at Joseph Haines's. They con- 

 tain marl along their banks almost to the source of the stream. 

 None of the overlying limestone seems to occur nearer the 

 Delaware than this point, for the marl here is tiie uppermost 

 stratum. 



The limestone belt measured from northwest to southeast, 

 appears, as far as exposed, to be about one mile wide, and there 

 are pretty good reasons for concluding that it expands still more 

 to the southeast. In the marl at J. Haines's, shells, shark's teeth 

 and bones are occasionally found. 



The marl is traceable as far to the southeast as Pricket's, upon 

 the edge of the sandy tract, denominated from the prevailing 

 timber, the Pines. ' It is here very similar to the upper and mo- 

 derately pure variety seen in the stratum at Med ford. 



Near Medford, which is about two miles from the edge of the 

 pines, pretty good marl abounds in all the ravines or meadows 

 adjacent to the town. 



Evesham. — Some of the marl in this vicinity is remarkably 

 pure, as the following analysis will show : 



Marl from Evesham, Burlington county. 



Description. — Colour, a medium tint of green ; granules of 

 rather large size. 



Composition. — In 100 parts : 



Greensand, . - . lOO 



Clay, .... none. 



Quartzose sand, - - none. 



The proportion of potash, by direct analysis, is 11 per cent. 



On the north branch of Cooper's creek, and about one and a 

 half miles south by west from Swain's, the marl is very exten- 

 sively laid bare in the banks bordering the meadows. The marl 



