Ibailey-matthew] new BRUNSWICK GEOLOGY 127 



and in parallel folds with the Upper Silurian. So, in the Cambrian 

 belt of the Kennebecasis, the fragmentary and isolated position of 

 the outcrops, and the want of contacts with other groups, leaves this 

 question in doubt; but in the parallel trough of the Long Reach tilted 

 Cambrian beds are overlaid by moderately inclined strata carrying 

 Silurian fossils, and therefore show that the disturbances affecting 

 the former antedate the Silurian era. 



The Cambrian rocks of northern New Brunswick as far as recog- 

 nized, are also highly tilted and unconformably overlaid by Silurian 

 strata. 



Post Ordovician. The rocks which in southern New Brunswick 

 carry a Cambro-Silurian or Ordovician fauna are of too limited extent 

 to justify drawing from them any general conclusions. The same is 

 true of their exposures in Carleton county and York, except to say 

 that they, in common with all other rocks of the region, have been pro- 

 foundly afïected by diastrophic movements of uncertain date. The 

 same is true of the "dark argillites" which in portions of Queens and 

 Charlotte counties flank the northern slopes of the great Nerepis 

 granite batholith. 



Silurian and Post- Silurian. The Silurian rocks which are so 

 widely spread over the province give at many points evidences of 

 profound diastrophism. One of the most marked of these physical 

 breaks is to be seen in the northern Highlands where the greatly 

 folded fossiliferous and calcareous slates of Gloucester, Victoria, and 

 Madawaska counties come into contact with the nearly fîat volcanic 

 plateau at the head of the Nepisiquit and Tobique rivers. The course 

 of this great dislocation is approximately SW and follows in part that 

 of the Nictor Branch of the Tobique, ^nd further west that of the upper 

 part of Eel River to Monument settlement on the border. 



Somewhat similarly, in southern New Brunswick, we have the 

 fossiliferous Silurian strata of Queens county lying in some places 

 nearly horizontal around the old Pre-Cambrian hills on the north side 

 of the Long Reach, while on the south side of the same sheet of water 

 •they accord with the nearly vertical position of the Kingston group 

 with which they are here so intimately associated. 



Finally, around Passamaquoddy Bay, the Silurian rocks, sand- 

 stones below and volcanics above, are, as at Chamcook Lake and 

 Eastport, nearly flat, while on the Mascarene shore, and in the Western 

 Islands they are uplifted at considerable angles. Between the town 

 of St. George and Bocabec river, the beds would appear to be several 

 times repeated by successive and concentric downthrows in the direc- 

 tion of the Bay. 



