IO 



NEW YORK STATE MUSEUM 



u v 



C 



The foregoing is a lucid sketch and gives an essential clue 

 to the nature of the stratigraphy and the character of the 

 fossil fauna, the affiliation of which with the Helderbergian 

 of New York is admitted. 



The field was entered by Dr Ells in 1879-80, who has 

 briefly mentioned the area 1 and colored it on the larger map 

 of New Brunswick, sheet 3, S. W., a small portion of which 

 we have reproduced here. Dr Ells did not, however, enter 

 into a detailed notice of the structure of the region at this 

 point. It is to Dr H. M. Ami that we owe the term Dal- 

 housie formation which we are applying to these beds [Equisse 

 geologique du Canada, 1902, p. 27, III]. 2 



The rock section. In the succession as here presented 

 though interbedded with and interrupted by volcanics, there 

 appears to be no break, displacement or duplication by faulting, 

 the strata dipping to the n. ne. at a high angle quite uniformly 

 70" to 75 . The base of the series lies at the south end. 



1 Geol. Sur. Can. Rep't, p. 20 I). 



2 The writer's first \ isit to this interesting locality was in 1900 in 

 company with Prof. Charles Schuchert of the National Museum, now of 

 Vale University. Very extensive < ollections were made here by both of 

 us and subsequently at the Gaspe localities which have already been 

 described. We then entered upon a mutual understanding by virtue of 

 which the faunas of the Lower Devonic beds including the Dalhousie 

 series and the St Alban and Cape Bon Ami beds of Gaspe were to be 

 elaborated by Mr Schuchert and the faunas of the Grande Greve lime- 

 stones by the writer. As time passed and the latter's work was going 

 well forward Mr Schuchert was cal'ed to New Haven before he had found 

 opportunity to begin his investigations, and thereupon faced by many 

 other duties he voluntarily and very graciously relinquished to my hands 

 the study of the entire series of faunas, and with it all the collections 

 made therefrom by him for the National Museum. The representation 

 of the Dalhousie fauna on which this treatise is based has, like that of the 

 Gaspe faunas, not been meager. 



