202 Quaternary Formations of Southern New Jersey. 



the Cape May formation. In other words, the relations at 

 Asbury Park are much the same as at Edgemere and South 

 Elebron. The beach sand and gravel rest on a sloping surface 

 of Eocene marl, the top of which is below sea level for half a 

 mile or so back from the shore. These relations continue to 

 Shark River. 



The same relations hold in general from Shark River to 

 Manasquan River. There is a belt a mile and a half wide next 

 the shore, mostly below 30 feet. The shore-ward half of this 

 belt is modern sand and gravel, the land-ward half a sloping 

 surface of Miocene, covered by a thin mantle of sand and gravel 

 of Cape May age, which thins westward. 



Shrewsbury and Swimming Rivers. — The Cape May forma- 

 tion has some representation in all the principal tributaries of the 

 Swimming River, and a larger development east of Red Bank, 

 bordering the bay called Shrewsbury or Navesink River. Indeed 

 it covers much of the peninsula between the Shrewsbury River, 

 and the wider bay to the south called Little Shrewsbury River. 



At the lower end of Swimming River the formation has an 

 elevation of about 40 feet in the vicinity of Red Bank, but rises 

 progressively up stream to 160 feet near the headwaters of 

 some of the branches of Hop Brook, heading in the Beacon Hill 

 region. Along Yellow Brook and Pine Brook, the other branches 

 of Swimming River, it does not rise so high, obviously because 

 these creeks do not head in such high land. 



Between Oceanic and Red Bank there are more or less distinct 

 terraces along the coast at levels ranging' from 20 to 40 feet. 

 These are composed of 10-20 feet of Cape May material over 

 a Cretaceous bench. Red Bank stands on a terrace of this sort. 

 There are similar terraces on the north side of Shrewsbury River, 

 especially at the lower ends of tributary streams. In height and 

 constitution these terraces are like those at Atlantic Highlands, 

 Cliffwood, and Lawrence Harbor (see below), and doubtless 

 are one with them in origin. Sections show well-stratified sand 

 and gravel. These conditions suggest a stand of the land once 

 40 feet lower than now, at which time there was some accumula- 



