50 Quaternary Formations of Southern New Jersey. 



Base. — Northwest of Berlin, the Bridgeton base has an ele- 

 vation of about 200 feet. Thence it declines southeastward to 

 160 feet at Wilton, 140 feet at Blue Anchor, 1 10-120 feet at 

 Hammonton, about 100 feet at Da Costa, 80 feet about Elwood, 

 and 60—70 feet at Egg Harbor City and Pleasantville. 



The correlation of the Bridgeton at the southeast is somewhat 

 uncertain, and its separation from the Pensauken may be ques- 

 tioned; but the decline from Berlin to Elwood, if continued, 

 would bring the base of the formation down to the level indicated, 

 at Pleasantville. The constitution of the sands and gravels at 

 the higher levels near Pleasantville is consistent with this inter- 

 pretation. If the gravels and sands of the higher levels about 

 Pleasantville are Bridgeton, the base of the formation declines 

 about 150 feet in 36 miles, giving it a dip of a little more than 

 4 feet per mile. 



The base of the formation shows some irregularities, but they 

 are of a small sort, and in keeping with those farther northwest. 



The Woodmansie Phase. 



Several cross sections from northwest to southeast, across the 

 Coastal Plain, illustrate 'the general relations of this phase of 

 the formation. 



ARNEYS MOUNT TO TUCKERTON. 



Distribution. — The area through which this section (Fig. 32) 

 runs is mostly in the basins of Mullica River and Rancocas Creek, 

 the two largest streams of the Coastal Plain in New Jersey. The 

 area from Arneys Mount to Apple Pie Hill (near Harris Station) 

 is in the drainage basin of Rancocas Creek, while the area south-' 

 east of Apple Pie Hill is in the basin of Wading River, a tribu- 

 tary of the Mullica River. The section is extended to the vicinity 

 of Kinkora on the Delaware. 



The conspicuous features of the section are (1) the broad 

 lowland to the northwest, near the Delaware, (2) Arneys Mount 

 and Apple Pie Hill, and (3) the upland at Munion Field near 

 the ocean. 



