

NEW BRUNSmCK. 



363 



Of the Bloomsbury group, which hxtcr was united to the Coldbrook 

 group, he stutcs : 



" The association of the Bloomsbury rocks with the Groups which are to fol- 

 low, is conclusively proved by the general similarity of their deposits, by their 

 entire conformability, and the absence of such perfect coidbnnability between 

 these and the Primordial (or Saint John) rocks below. As the overlying beds 

 have been shown to be unquestionably of Upper Devonian age, there can be no 

 hesitation in referring the Bloomsbury Group to the same horizon." (/. c, 

 p. 53.) 



The Coldbrook group, while nominally underlying the St. John 

 group, was found in another place overlying it. In this locality it 

 seems that the rocks were i-ecognizcd as Coldbrook (Huronian) from 

 lithological characters, and their stratigraphical position explained by a 

 reversed folding. [L c, pp. 23, 28, 29.) 



In regard to the age of the Kingston group, which with the Mica 

 Schist formation appears to bo the Upper Silurian of Matthew, it is 

 said : — 



*^We have only the general lithological characters and the stratigraphical 

 relations upon which to rely for the determination of this important question. 

 As the conclusions derived from these two independent sources accord exactly, 

 we may consider the position of this formation as established with some degree 

 of certainty." {l. c, p. 38.) 



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Again he states, quoting from Mr. Matthew : 



** Their relations to other groups, as well as their appearance when altered, 

 indicate that the Kingston rocks and their associates may be provisionally 

 looked upon as Upper Silurian, though Middle Silurian and Lower Devonian 

 beds may also occur. The only objection to this view is the absence of such 

 hard rocks along the outcrops of the soft Lower Silurian strata in Saint John 

 County, where these latter are covered by deposits of Upper Devonian age. 

 This may be accounted for by denudation subsequent to their deposition, or by 

 supposing an elevation of the older rocks above the sea when those of Kingston 

 were being formed." {L c, p. 39.) 



The arrangement of the formations in this report, it has been seen 

 from the above, is as follows : 



Laurentian. The Portland group, if it is not Huronian, doubt existing. 

 IIuiiONXAN. Coldbrook group, probably. 

 Potsdam and Quebec. St. John group. 



The Kingston group. 



Limestones of Dalhousic. 



UrrER Silurian 



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