202 CLAYS AND CLAY INDUSTRY. 



station (PI. XXIII, Figs, i and 2). Here the lense-like character 

 of the clay beds are strikingly shown. In the middle of the bank, 

 where it is highest, the section in 1902 showed : 



Pensauken gravel, 10 ft. 



Raritan white sand, with thin clay lenses, 30 ft. 



Much of the sand is sold for fire sand, and some of the clay is 

 said to be a fire clay. 



The variable character of the Raritan formation in this part of 

 the State and the impossibility of separating it into; persistent 

 horizons is well brought out by the record of 2 wells at Jordan- 

 town, 1 mile northeast of Merchantville, drilled for the water 

 supply of the latter place. The wells are located along the swampy 

 flood plain of the South Branch of Pensauken creek at an eleva- 

 tion of less than 5 feet A. T. and 100 yards apart. 



Sections in Wells at Jordantown, near Merchantville. 



Well No. 1. 



Gritty white clay, from 41 to 



Gritty white clay " 



Sandy clay, 

 White clay, 

 Sandy clay, 

 Sandy clay 



41 to 



52 ft 



57 to 



63 " 



70 to 



73 " 



78 to 



80 " 



84 to 



86 " 



95 to 



97 " 



Well No. 2. 



Thin sandy clay, at 46 ft. 



Smooth clay, from 56-58 



Three-inch seam of clay, at 73 



Sand, from 73 to 1 1 1 



Gritty clay, from 111 to 115 



Smooth white clay, from 136 to 146 



Blue clay, from 183 to 205+ ft. 



Between the clay beds loose sand, ranging in some cases up to 

 small gravel, was found. The above sections show that the first 

 three clay beds in Well No. 1 are represented by only thin seams 

 in No. 2, while the last three clay beds in No. 1 are absent entirely 

 in No'. 2, or were so thin as not to have been recognized at all in 

 drilling. The deeper clays in Well No. 2 were not reached by 

 Well No. 1, so we cannot compare that part of the section. 



