242 THE DEVONIAN AND CARBONIFEROUS. [bull. 80. 



Kiver section. On the west bank of East Kiver, at New Glasgow 

 bridge, occurs the New Glasgow conglomerate, 430 feet thick. The 

 pebbles are of Millstone grit and Devonian, and in some cases the 

 cementing matter is calcareous. A section of these conglomerates, at 

 Alma Mills bridge, of 1,372 feet, is reported. This conglomerate, inter- 

 mediate between the Millstone grit and the Productive Coal Measures, 

 is the base of Da wson's -Middle Coal formation. Tracing it westwardly 

 it was found in places to lie directly upon altered Devonian rocks. 



In describing the Productive Coal Measures the author gives a 

 detailed account of the Measures at the Albion and Acadia mines, in 

 which fourteen coal seams are mentioned, the total thickness of the 

 Albion being 2,452 feet 11 inches. To show the variation in the char- 

 acter of the rocks in this section an account is given of the Forster Pit 

 section. The Productive Measures are situated between three faults : 

 one on the north passing through New Glasgow, one in the west bring- 

 ing the Devonian series and Millstone grit in contact with the Coal 

 Measures, and the third on the south side of the area. In this area are 

 two synclinal folds running in an east and west direction, and desig- 

 nated as the Albion and Bear Creek synclinals j both are limited by 

 the west fault. 



Charles Eobb, in 1870, 1 made a report on part of New Brunswick. 



The Lower Carboniferous rocks of New Brunswick " lie between the 

 southern boundary of the county of York and the unconformable 

 altered slates to the northwest." They consist mainly of sedimentary 

 deposits derived from the neighboring metamorphic hills. These de- 

 posits are occasionally invaded by igneous intrusions. The sandstones 

 are of a reddish color, and at places contain considerable micaceous 

 and calcareous matter. The author considers them to be about 1,000 

 feet in thickness. No fossils were observed. 



The Upper Conglomerate consists of siliceous material, not calcare- 

 ous, followed by gray sandstones containing Catamites, Cordaites, and 

 other vegetable remains, with an occasional seam of coal. 



The following classification of the Pictou coal field was made by Sir 

 William E. Logan in 1870 : 2 



Pre-carboniferous or Devonian 1. Conglomerates, quartzites, and compact slates. 



f 2. Greenish gray and red sandstones, with conglomerates and impure 



Carboniferous] 1 J mestones - 



3. Red coarse conglomerates. 



1^4. Productive Coal Measures. 



The rocks of the first series form parts of McGregor's and McLellan's 

 Mountains. The author called them u pre*Carboniferous," and assigned 

 them to the Devonian age on the authority of Mr. Dawson, who gave 

 them that position in his "Acadian Geology." The author considered 



1 Robb., Charles: Report on the geology of a part of New Brunswick. Geol. Survey of Canada; 

 Report of Progress for 1860-1869, pp. 173-209, map. 



1 Logan, W. E.: Report on a part of the Pictou coal field. Geol. Survey of Canada ; Report of Prog- 

 ress lor 1866-1869, 1870, pp. 3-17, map. 



