I found the geological explanation in this link very interesting. He does a great service to New Jersey citizens by his interesting and knowledgeable interpretations.
	
	
		
			
				
					
						 
					
				
			
			
				
					
						
							 written-in-stone-seen-through-my-lens.blogspot.com
						
					
					written-in-stone-seen-through-my-lens.blogspot.com
				
			
		
	
			
			 
					
				Big Brook - New Jersey's Classic Late Cretaceous, Fossil-Collecting Locality
"At first it may seem to be a piddly little dribble through the farmlands and forests of rural New Jersey,    but careful observation shows...
				 
				
		 
			 
 
		