1 66 Quaternary Formations of Southern New Jersey. 



White Horse and north of Crosswicks Creek. Here the Dela- 

 ware swing's over to the east side of its valley, and the real con- 

 tinuation of the Trenton gravel plain is west of the river. At 

 Florence, the Delaware again leaves what was its eastern border 

 in the Cape May epoch, and glacial gravel reappears there on 

 the New Jersey side of the river. 



From Trenton (Chambersburg), the formation extends north- 

 eastward in a broad belt up to Bakers Basin. Farther north- 

 east it is continued in a narrower belt over the low divide be- 

 tween Shipetaukin Creek and Stony Brook, and down the valley 

 of the latter to its junction with the Millstone River. The for- 

 mation also extends up the valley of Duck Pond Run from Port 

 Mercer, and over the low divide to the Millstone at Princeton 

 Junction, and thence down the valley of the Millstone to the 

 mouth of Stony Brook. Meager and dissevered remnants of the 

 formation are also found in the valley of the Millstone from 

 this point to its junction with the Raritan. 



At Trenton, and thence to Bakers Basin, the formation is 

 largely of gravel brought down by the Delaware from the 

 moraine at Belvidere during the last, glacial epoch. Glacial gravel 

 is found also from Bakers Basin to the Millstone, as well as at 

 various points along the Millstone to, the Raritan. Since these 

 gravels are a little higher at the north (70 feet at East Mill- 

 stone), it is inferred that the ^drainage which brought them in 

 flowed from the Raritan to the Delaware, and the composition of 

 the gravels points to the same conclusion. It is inferred there- 

 fore that, temporarily at least, during the last glacial epoch, 

 drainage from the Raritan came up the Millstone to Stony Brook, 

 up the valley of that stream, and over the low divide to Assan- 

 pink Creek, and thence to the Delaware at or near Trenton. The 

 meager remnants of glacial gravel in the, valley of the Millstone 

 may mean that glacial drainage did not follow this course long, 

 or in large quantity. 



Aside from the chief belt of the formation in the valley of 

 Assanpink Creek, it appears in most, of the minor valleys of the 

 Raritan Bay-Trenton lowland, as (1) along Pond Run; (2) 

 along Miry Run for several miles, rising from 60 feet or so near 



