THE TRIASSIC PERIOD. 



15 



faults are continued into Pennsylvania. 1 Of the numerous small 

 faults, few have a throw of more than 200 feet. 



Of the southern areas, the Richmond area is best known. 2 As 



[MILE m 



g ^m^ Pomperaug 



1 



ft 







' 



Fig. 319. — Map showing the surface distribution of a sheet of igneous rock in the 

 Pomperaug area of Connecticut. The peculiarities of surface arrangement are 

 due to faulting. (Hobbs, U. S, Geol. Surv.) 



farther north, the beds here are much faulted and little folded (Fig. 

 322). The faulting is clearly shown by the surface distribution of 

 the series (Fig. 323). The trough-like basin which the Newark of 

 this area occupies, is thought to be the result of faulting rather than 

 of pre-Triassic topography. The Newark of this area contains a good 



1 Lyman, Report on the New Red Rock of Bucks and Montgomery counties 

 (Pa.), State Geol. Surv., Final Rept., Vol. Ill, Pt. II. 



2 Shaler and Woodworth, 19th Ann. Rept. U. S. Geol. Surv., Pt. II. 



