Bridgeton Formation 1 — Local Details. 



D aretown 



AvisMOls 



Sea level 



LEGEND 



Feet 



200 



GOHANSEY BRIDGETON CAPE MAY 



SCALES 



H orizontal scale 



3 M i les 



Fig. 14. 

 Section from Daretown to Avis Mills, Oldham Creek. 



appears to have corresponded with the present altitude of about 

 150 to 160 feet, and the lower altitudes of the surface now, are 

 due to subsequent lowering 1 by erosion. 



The base of the formation here has an elevation of 100 to 120 

 feet. Its thickness therefore reaches 40 to 50 feet, and perhaps 

 occasionally even 60 feet. This conclusion is drawn from the 

 elevation of the surface, and the known altitude of the base at 

 various points. No thickness of 60 feet has been seen in section, 

 but thicknesses of 45 feet are indicated at several points by the 

 records of wells. 



About Daretown, the base on which the Bridgeton rests is not 

 very irregular, as shown by Figs. 14 and 15. Such irregularities 

 as that shown in Big Mannington Hill may be partly or wholly 

 the result of displacement of the surface material. If not, this 

 outlier indicates that the pre-Bridgeton surface declined a little 

 to the west. 



The relations of the Bridgeton formation north of Salem Creek 

 are much like those to the south. Thus about Whig Lane, the 

 broad interstream areas are generally covered with Bridgeton 

 gravel and sand. To the west, the formation becomes more and 

 more dissected, and its last remnants in this direction are small 

 outliers such as that seen on the hill i 1 /* miles southeast of 

 Auburn (Fig. 16, p. 40). The base of the formation is rather 

 even along this divide, so far as known, and slightly higher than 

 south of Salem Creek, ranging from 120 to 130 feet. At points, 



