120 



SIDNEY POWERS 



west. Beyond this ledge there is no evidence of the existence of 

 any Triassic rocks. 



AGE 



The age of the Newark group must be determined by a compari- 

 son of its fauna and flora with that of Europe where the Triassic 

 system is well developed. As forms common to both countries 

 are not abundant, there are slight differences of opinion as to the 

 exact correlation. Table I gives a correlation scheme which is 

 modified from one given by Eastman. 1 



On the evidence of the fish fauna Eastman 2 concludes that 

 the Newark is to be correlated with middle and upper divisions 

 of the Alpine Trias (the Upper Muschelkalk-Middle Keuper of 

 the German section) . The plants indicate a similar age, and several 

 forms have been cited as the equivalent of the Lettenkohle forms 

 of Germany. 



In the Acadian area the fossils which have been found are: 

 plant remains at Split Rock (Gardner's Creek), Quaco, and 

 Martin Head, New Brunswick; fish remains in the Scots Bay 

 formation at Scots Bay; and impressions of the shells of bivalved 

 crustaceans in drift material from the Blomidon shale, found near 

 Kingsport. 



1 C. R. Eastman, "Triassic Fishes of Connecticut," Conn. Geol. and Nat. Hist. 

 Surv., Bull. 18, 191 1, p. 26. 



2 Ibid., p. 29. 



