176 Quaternary Formations of Southern New Jersey. 



graphy is to be seen. Above Walnford the same sort of sand, 

 probably eolian, occurs on the east side of the creek above New 

 Egypt, up to the point where the creek turns west ; but here the 

 sand, with a disposition to become slightly ridgelike, is much 

 interruped by side streams. The same sort of a sand ridge 

 appears on the left bank of Doctors Creek. It is feebly developed 

 just above Yardville, and better from a point a mile below 

 Allentown up to within a mile or so of Imlaystown. Along 

 this creek the sand is much less glauconitic than along Cross- 

 wicks Creek. 



The phenomena of these valleys are common ones in the 

 region, a low ridg-e of sand on the left banks of the streams, 

 and a terrace on the right banks, at a somewhat lower level. 



Lahaway Creek. — Along Lahaway Creek, between Horners- 

 town and Prospertown, there are interrupted and feeble terraces 

 rising to 140 feet at the latter place. The terrace material 

 ranges up to 20 feet in thickness, and is of sand and gravel, 

 the latter more abundant near the stream. These terraces are 

 not satisfactorily correlated. They may be of almost any age 

 from late Pensauken to Cape May. 



Along Crosswicks and Doctors creeks, there is no hesitation 

 in correlating all the distinct terraces of gravel and sand, at an 

 elevation of 60 feet near the lower ends of the valleys, and up 

 to 80 feet at Walnford and 120 at Imlaystown, with the Cape 

 May formation, and in regarding- them as the time equivalents 

 ~)i the gravels of late glacial age at Trenton. The feeble ridges 

 of sand on the left banks are probably mostly eolian, and of 

 similar age. 



IN THE TOWER DELAWARE DRAINAGE BASIN. 



Along; the Delaware; Bordentown to Florence. — From Bor- 

 dentown to Florence the lowland on the New Jersey side of 

 the Delaware is narrow, and the Cape May formation is chiefly 

 in the valleys of the tributary streams, which have wide low- 

 lands, relative to their own size. At Kinkora the Delaware low- 

 land widens somewhat, though interrupted at Florence by a 

 small area above the Cape May level. 



