388 



and the dark Cambrian slates on the south. The crystal- 

 line limestone beds as indicated by the associated dark 

 rocks, are much torn. The limestones are succeeded on 

 the north by quartzites and the boundary between these two 

 formations is in part at least, a fault plane whose general 

 course is indicated by the ledges of white quartzite out- 

 cropping beyond the railway bridge and a short distance 



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Fault between Tetragraptus shale and Acadian, near Suspension bridge, St, John, N.B. 



back from and approximately parallel to the cliffs forming 

 the shore of the river. 



The fault plane separating the Cambrian and Ordovician 

 is visible from the hillside south of the highway on the 

 western side of the river. The two sets of strata do not 

 sharply contrast in colour. The dense black, Ordovician 

 shales form the cliff back to two ruined docks, while the 

 greyer Cambrian measures form the rocky projection 

 extending westward parallel with and to the south of the 

 highway bridge. 



The small, bay-like indentation on the west side of the 

 river immediately below the highway bridge, marks the 

 line of the fault between the Pre-Cambrian and Cambrian 



