64 Quaternary Formations of Southern New Jersey. 



On the whole, the evidence seems to suggest that the region 

 in the vicinity of Hightstown must have been at or below what 

 is now the 150-foot level in Bridgeton time, and that a plain at 

 some such level at Hightstown corresponded to the 200-foot plain 

 at Carrs Tavern, and the 150- foot plain at Takewood. 



HOMINY HIEES MANASQUAN. 



Location of section. — Fig. 35 is a section from Bonhamton 

 north of the Raritan, to Manasquan, through Beacon Hill, Hom- 

 iny Hills, and Allenwood, slightly generalized and simplified. It 

 represents the general cross section of a belt a few miles wide, 

 rather than a section along a line. The most conspicuous feature 

 in the profile, as compared with preceding figures, is its relief. 

 The hills appear high and steepsided, and the valleys deep and 

 narrow. Comparing this section with Fig. 33, it will be seen 

 that there has been greater erosion in post-Beacon Hill time in 

 this region than in the vicinity of Woodmansie. 



Beacon Hill deposits. — The highest elevation is Beacon Hill, 

 with an altitude of 372 feet. It has a cap of gravel about 10 

 feet thick. Throckmorton Hill, in the Hominy Hills group, about 

 9 miles southeast of Beacon. Hill, has a similar cap of gravel. 

 Projecting a plane from the base of the gravel in Beacon Hill 

 through the corresponding position in Throckmorton Hill, it will 

 be found to pass over Manasquan at an elevation of 15.0 feet. 

 If this be regarded as the base of the Beacon Hill formation, it 

 indicates that the region about Manasquan has suffered notable 

 degradation in post-Beacon Hill time. Extending the same plane 

 northwest over the Amboy region, it has there an altitude of 

 400 feet. This would indicate a degradation of 200 to 300 feet 

 in this region in post-Beacon Hill time, if the Beacon Hill for- 

 mation once overspread this region, with its normal dip. 



Pre-Bridgeton surface. — From the profile, it is seen that at 

 Hillsdale there are areas of bare Cretaceous at an elevation of 

 about 250 feet, and others at Barrentown at about 200 feet. 

 Near Allenwood there are gravel-capped hills at 120 to 140 feet, 

 and this gravel appears to be Bridgeton although there may be 



