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NEW BRUNSWICK. 



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upon black carbonaceous crumbling shales These latter dark colored 



rocks resemble very closely some porti(jus of the St. John group as seen in the 

 city of St. John, and are supposed to be continuous with them through a belt 

 of similar rocks, extending across the peninsula of Pisarinco, aud coming out at 

 Mill Creek in Pisarinco Harbor. In this view, it is probable that the structure 

 indicated in this group at St. John, and to be presently ]ioticedj will hold good 

 here also, viz. : That the St. John group is inverted upon itself, and tliat the 

 green crystalline schists, tlnjugh overlying that group,'are in reality more an- 

 cient and probably of lluronian age." (I, c, p. 60.) 



Of the lluronian rocks at Ratcliffo's mill-stream it is stated tliat 



" they overlie the Primordial strata, both formations occupying a nearly verti- 

 cal position, with a slight southward inclination, and both being inverted." 

 {I. c, p. 63.) 



Of the Bloomsbury group it is again remarked : 



" In our earlier publication, this hill .... has been referred, from the fact 

 of its overlying the slatef? of the St. John group, to the Devonian scries ; but 

 the close resemblance in aspect borne by the rocks composing it to those so 

 largely developed to the north and north east, from which they are se])arated 

 only by a narrow valley, renders it more probable that the great mass of strata 

 in this hill is of lluronian age, and that, tliough here apparently resting upon 

 the Primordial strata (wlijch in the valley alluded to dip southerly under 

 Bloomsbury Mountain) they are in reality more ancient than these latter, and 

 are liere brought up along a line of fault in a similar manner to those of 

 Eatclille's millstream.'^ {l. c, pp. 63, 64.) 



The upper part of the Coldbrook group, from its conformably under- 

 lying at other places the St. John group, and from its containing peb- 

 bles supposed to have boon derived from the lower portion of the 

 Coldbrook group, was regarded as forming the base of the Primordial 

 or St. John group, (/. c, p. 59,) an unfossiliferous portion of the latter. 

 As we have seen before, part of the Coldbrook group was found resting 

 on the St. John group ■ the latter was supposed to have been inverted 

 upon itself, which would explain the fact that Huroniau rocks were 

 overlying Primordial ones. (I. c, pp. 136-139.) 



Of the rocks of the Coastal group it is said that they 



*' have been found to overlie, at several points, strata of Upper Silurian and 

 LoAver Devonian age. Hence, those occurring along the coast were, in our re- 

 port on the geology of Southern New Brunswick, described in connection with 

 the Devonian rocks of St. John County, under the aen(miination of the Coastal 

 group, Dr. Hunt, however, who has examined a large number of specimens 

 collected from these rocks, and has visited a part of the districts in Avhich they 

 occur, is of ojunion that their lithological aspect is such as to indicate much 



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