Pensauken Formation — Local Details. 147 



age as it now is. But it is perhaps not too high if the drainage 

 which developed it followed a sufficiently roundabout route when 

 the plain was making. If, for example, the drainage of the 

 Matchaponix went to Trenton by way of Bound Brook (city), 

 and up the present Millstone, the headwaters of the Matcha- 

 ponix, Deep Run, etc., might have developed a plain at a high 

 level, possibly 150 feet. Furthermore, if the stream which these 

 creeks joined crossed Rocky Hill 100 feet or less above sea level, 

 this would have been the base controlling all levels above. A 

 base at 70 feet at Kingston, would mean a fall of 80 feet from 

 Englishtown, by way of Bound Brook, to Kingston, and this is 

 probably not too high for the development of a plain at 150 feet 

 at the former place. 



T 



OUTLYING AREAS EAST OE MATAWAN. 



General Statement. — Between Matawan on the west and At- 

 lantic Highlands on the east, there are numerous patches of 

 gravel at levels which are rather low (50 feet to 90 feet) for 

 Pensauken. Similar gravels occur south of Matawan and west 

 of Cliffwood. These gravels are doubtless the counterpart of 

 similar deposits south of the divide between Morganville and 

 Middletown, but their correlation with the Pensauken is doubt- 

 ful. They are perhaps the equivalent of the surface accumula- 

 tions between Freehold and Englishtown, being somewhat 

 younger than the Pensauken. Mr. Knapp is disposed to recog- 

 nize a stage of deposition between the Pensauken and the Cape 

 May, calling it Walnford, and would group the surface deposits 

 between Matawan and Atlantic Highlands above the level of the 

 Cape May formation under this name. Irrespective of the name, 

 and of the probable existence of a stage of deposition between 

 the Pensauken and the Cape May distinct enough to be separately 

 recognized, it is probably true that the gravels mentioned above 

 are intermediate in age between the Pensauken and the Cape 

 May formations. Gravels a mile southwest of Cliffwood belong 

 to the same category. 



Knapp thinks the equivalent of the Jobstown flat can be traced, 

 with interruptions, to Englishtown, and that its equivalent at 



