144 



W. H. HOBBS FORMER EXTENT OF THE NEWARK SYSTEM 



extremely probable that the several areas have been depressed along 

 fault walls below the baselevel of erosion, and hence preserved where we 

 now find them. Their local occurrence would thus be fully accounted 

 for. 



■ Iv-^W \ 



Figure i. — Sketch Map of Newark Area of New 

 York and New Jersey. 



Figure 5.— Sketch Map of Newark Area of 

 Richmond Basin. 



Based on maps by Kiimmel. Full lines repre- After Shaler and Woodworth. Full lines rep- 



sent faults. resent faults, ashed lines probable faults. 



Attempt to Picture Newark Conditions of Deposition 



COARSENESS OF SEDIMENTS 



The coarseness of the Newark sediments, and especially the occur- 

 rences of arkoses and giant conglomerates, furnish the greatest obstacle 

 to forming a picture of the Newark period, a powerful transporting agent 

 being generally assumed to be necessary to explain the distribution of 

 these conglomerates. The tides of a deep bay or estuary having steep 

 walls has been the most frequently assumed. In the more recent work 

 Emerson has invoked this condition to explain the deposition within 

 the Massachusetts area, southern New England being supposed a Rias 

 coast and the Connecticut valley a deep, fjord-like bay into which the 



