66 Quaternary Formations of Southern New Jersey. 



VICINITY OE BEACON HIEE AND NORTHWEST. 



In the region about Beacon Hill, there is very little gravel and 

 sand which can be correlated with the Bridgeton. Eastward, 

 near Chapel Hill, and in the Navesink Highlands, there is gravel 

 at 200 to 220 feet which may be so correlated, but most of this 

 material appears to have suffered but little re-working from some 

 older formation, probably the Beacon Hill. 



Northwest of Beacon Hill, the section, Fig. 35, is continued 

 to Bonhamtown, but shows no certain Bridgeton. At Morris- 

 town, near Matawan, a small hill at 150 feet is shown with a 

 cap of gravel. There is also gravel in a bench a few feet below 

 the top of this hill (at 120 to 140 feet). The gravel at the 

 lower level at Morristown is similar to the Pensauken material 

 between Matawan and Freehold. That on the top of the hill 

 is sufficiently different to suggest, but not to prove, their dis- 

 tinctness. Whether the gravel at the top and that on the bench 

 belong together, or whether they represent Bridgeton and Pen- 

 sauken, is uncertain. 



The Browntown hills southwest of Matawan, with their gravel 

 caps at about 200 feet, stand in much the same relation to Beacon 

 Hill, as Disbrows Hill does to the hills at Clarksburg. The 

 gravel caps of the Browntown hills, rather than the 150-foot 

 hill at Morristown, may represent the true Bridgeton level for 

 this region. 



In the vicinity of South Amboy and Sayreville, there are con- 

 siderable areas of gravel, the base of which is irregular. The 

 lowest level of its base at Bonhamtown is about 60 feet, and the 

 maximum altitude of its surface, near South Amboy, is nearly 

 190 feet. It is referred to the Pensauken, and will be described 

 more at length later. 



