CLAYS OF CAMDEN COUNTY. 399 



shrinkage at cone 1 is 11.2 per cent., and the absorption of the 

 bricklet 10.22 per cent. It burns to 1 a light-red color and is steel- 

 hard at this cone. 



Haddoniiehi. — Along the road near a mill pond and northeast 

 of Haddonfield (Loc. 147), Clay Marl II is exposed in the follow- 

 ing section : 



Section near Haddonfield. 



1. Loam, 3 ft. 



2. Weathered clay, 4 



3. Black clay, 5 " 



4. Ironstone, 2 in. 



5. Clayey sand with marl grains, 5 ft. 



A mixture of 2 and 3 (Lab. No. 635) was tested physically. 

 It worked up with 29 per cent, of water to a mass having an 

 air shrinkage of 7 per cent. Its tensile strength was 243 pounds 

 per square inch. At cone 03 its fire shrinkage was 3.3 per cent. ; 

 absorption, 17.24 per cent.; color, pinkish red, and bricklet not 

 steel-hard. At cone 1, fire shrinkage, 5 per cent.; absorption, 

 10.31 ; color, light red, and bricklet steel-hard. 



Pensauken creek. — Along the road from Merchantville to Eves- 

 boro, and at a point 2 miles due north of Ellisbury, there is 

 an outcrop of at least 7 feet of plastic, buff-colored clay along the 

 roadside (Loc. 152). The material (Lab. No: 714) is not highly 

 plastic, and contains little grit. When mixed with 38.5 per cent, 

 of water it had an air shrinkage of 8.3 per cent. Its average 

 tensile strength was 126 pounds per square inch. At cone 1 its 

 fire shrinkage was 7 per cent., and absorption 8.19 per cent. At 

 this cone it was steel-hard and burned red. Its fire shrinkage 

 was higher than many of the other occurrences of Clay Marl II. 



Good exposures of Clay Marl II are also found along the bank 

 of the creek just south of Oakdale station (Loc. 159). 



Little Timber creek. — Another outcrop lies along Little Timber 

 creek (Loc. 158), i x /\. miles southwest of Mount Ephraim. The 

 material is probably in part Clay Marl I, and outcrops along the 

 road. The thickness of the bed as determined by boring exceeds 

 7 feet, while the sandy overburden is 7 to' 8 feet thick. The 

 material (Lab. No. 612) takes little water for tempering (22.8 



