[BAILEY-MATTHEW] NEW BRUNSWICK GEOLOGY 129 



the Millstone Grit. As in the case of other formations, diastrophic 

 movements were more marked in the vicinity of the Bay of Fundy, 

 always a subsiding trough, than elsewhere. 



Carboniferous. Except in the Bay of Fundy trough, the Carboni- 

 ferous rocks all over New Brunswick lie at very low angles, and show 

 little evidence of deformation. They have, however, been very 

 extensively eroded, and are found resting, nearly horizontally, on 

 members of all the older groups, with or without the interposition of 

 the Lower Carboniferous. In the Bay of Fundy trough the axes of 

 disturbance lie parallel to the old Pre-Cambrian range of Caledonia 

 Mt., but eastward of the latter, show a tendency to cross the Bay and 

 to connect with the Carboniferous rocks of the Joggins in Nova Scotia. 



Post Carboniferous. The only two formations found in New 

 Brunswick which are more recent than that of the Coal Era, are the 

 Trias (or Jurassic) and Quaternary, but, though with these also some 

 unsolved problems suggest themselves, it is not considered possible 

 or desirable to discuss them here. 



Summary. The general results of the foregoing observations, as 

 regards the distinction and succession of formations and intervening 

 disturbances are given in the following table. 



Table of Formations and ITnconformities in New Brunswick. 



Table of Formations and Unconformities in New Brunswick 



I. Laiireîttian 



Lower. Fundamental Gneiss and batholitic Granite. 



Unconformity. 

 Upper. Limestone-quartzite Series. Mica schists, Argillites, etc. 



Unconformity, with production of hill ranges and basins, ex- 

 tensive weathering and erosion of land surfaces. Intrusion of 

 basic dykes, granodiorite, etc. 



1 1 . Huronian 



Kingston Series. Mostly effusive rocks, with schists, etc. 



Unconformity. 

 Coastal Series. Conglomerates, sandstones, schists, etc. 



Unconformity. 



III. Cambrian 



Coldbrookian. Volcanic. 



Etcheminian. Red sediments and volcanic effusives. 

 St. John Group. Gray sandstones, flags, clay slates, etc. 

 Unconformity, with plication. 



IV. Ordovician 



Gray sandstones and gray to black slates. 

 Unconformity. 



