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THE ROYAL SOCIETY OF CANADA 



another group of slates to the south of the Mascareen, dipping at a 

 high angle and much broken up by intrusives; in these last slates 

 they found no fossils, and for this reason did not include them in the 

 Silurian. In the extension of this group into the State of Maine, 

 though the rocks were largely of volcanic origin, some slates with 

 fossils were found. Hence it is now thought that these also should 

 be included in the Silurian strata, and that there is here a break in 

 the Silurian such as occurs at St. John in the upper part of the St. 

 John Group where Ordovician fossils are found. 



The condition of the several groups of the Palaeozoic, etc., as 

 they shovv^ in and near St. John from this point of view may be pre- 

 sented in the following table: 



ROCKS AT ST. JOHN 



Portland Group 

 Very great unconformity 



Cambrian. 



Silurian. 



ÎColdbrook Group and 

 Etcheminian Series 

 St. John Group 

 (3 divisions) 



Base of Palaeozoic, including 

 Cambrian and Base of Ordo- 

 vician 



Uncoxformity 

 Ordovician (Middle and Upper wanting) 



Bloomsbury volcanics 

 1 m. thick at Quaco 



Quoddy slate I 



Dennys slate f ^ 



^ Unconformity 



Little River Group Mascareen 



Dadoxylon Sandstone Beaver Harbour 



Cordaite slate and Eastport, etc., slates 



Sandstone 



Unconformity 

 Lower /Mispec Group Unknown at Eastport 



Devonian <Conglom. and dark red 



^ slates 



Limit 



of 



slaty 



cleavage 



Great Unconformity 

 Here eruption of Nerepis, St. George, etc., granite 



/-Conglomerate 

 Upper J Red sandstone 



Devonian | Dark red shale 



Gray sandstone and shale 



Perry plants Upper Dev. fide J. W. 

 Dawson & David White, 

 Pocono beds. 



