140 Quaternary Formations of Southern New Jersey. 



The Pensauken about South Amboy and Ernston represents 

 the northwest phase of the formation, as distinct from the south- 

 east phase, a distinction which has held across the State from 

 Delaware Bay to this point. The distinction is as sharp here 

 as to the southwest. The arkose phase of the Pensauken is 

 limited at the south by the valley of Cheesequake Creek. 



outlying areas of pensauken, east of south river. 



Northzvest of Englishtown. — There is a cap of Pensauken 

 gravel, of non-arkose type, on Gravel Hill west of Manalapan 

 Creek, a mile and more southeast of Hoffmans Station. This 

 connects with the arkose Pensauken south of Jamesburg. Similar 

 gravel covers the divide a mile or so east of Manalapan Creek 

 between Englishtown and Jamestown. The material in the two 

 places is essentiallly alike, and occurs at similar elevations, and 

 the two areas probably were connected originally. They reach 

 a maximum altitude of 187 feet, and the altitude of their bases 

 ranges from 140+ feet at the south, to 80 feet at the northwest. 

 They seem to correlate with the main body of the formation to 

 the northwest. The material here is non-arkose, like the upper 

 part of the formation in the Jamesburg railway cut. These 

 areas have their chief significance in connection with remnants 

 of gravel, probably of Pensauken age, about the headwaters of 

 the Matchaponix drainage system, east of Englishtown and north 

 of Freehold. 



Southeast and east of Englishtown. — East of South River and 

 Matchaponix Brook there is relatively little material which can 

 be correlated with the Pensauken with certainty. Southeast of 

 Englishtown there are patches of gravel — some small, some 

 large — near Manalapan Creek, above Blacks Mills, and about the 

 headwaters of the creeks which unite to form Matchaponix 

 Brook, as on Monmouth battleground, in the vicinity of Lafayette 

 Mills, Gordons Corners, Union Hill, and elsewhere; or, in 

 general, in an area extending from Robertsville (2 miles west of 

 Wickatunk) on the north, to Blacks Mills (4 miles west of 

 Freehold) on the south. These gravels are below the level 



