THE CARBONIFEROUS. 49 



however, barely possible that they may represent the Lower Carboni- 

 ferous Coal measures, otherwise wanting in this district. 



The great and exceptional conglomerate of the Pictou Coal-district, 

 known as the New Glasgow Conglomerate, appears to be a shingle 

 bed of the Upper Millstone-grit or Middle Coal formation epoch. It 

 stretches with some interruptions from Merigomish to Roger's II ill 

 and Mt. Dalhousie, near the eastern end of the Cobequid Ridge, or 

 about twenty miles, and is undoubtedly connected with the different 

 developments of the beds of the Coal formation on the south and 

 north of this line ; audit implies very great and violent denudation 

 of the Lower Carboniferous sandstones during the Coal formation 

 period, as the fragments contained in it are largely composed of these 

 sandstones, and are often of great size. (Acadian Geology, p. 321, 

 et seq. ; Logan, Report on Pictou, 1869.) 



At the extreme eastern end of the Pictou Coal-field, where it is in 

 contact with the Upper Silurian at M'Cara's Brook, the Lowest 

 Carboniferous beds are conglomerates with interstratified trap, above 

 which is marine limestone overlaid by the Millstone-grit series. 

 (Journal of Geol. Society, vol. i. p. 329 ; Acadian Geology, section 

 opposite page 125.) 



In the Carboniferous area of Antigonish County we again meet 

 with the dark shales and sandstones of the Horton group, holding 

 their characteristic plants, and underlying the marine limestones and 

 gypsums. I noticed these beds as occurring at Right's River in 

 1843;* and Dr Honeyman, who subsequently traced them further to 

 the eastward, has kindly placed in my hands a .small but interesting 

 collection of their fossil plants. 



The long belt of Carboniferous rocks extending along the west 

 branch of the St Mary's River, has the mineral character and fossils 

 of the Millstone-grit series in those places where 1 have examined 

 it, except near Guysboro, where there are Lower Carboniferous 

 limestones, and in the Strait of Canso, near Cape Porcupine, where 

 the basal conglomerates appear. (Acadian Geology, p. 350.) 



In Cape Breton a well-characterized representation of the Lower 

 Carboniferous Coal measures or Horton scries is seen in the sand- 

 stones, gray and black shales, and conglomerates which underlie the 

 limestone and gypsum of Plaister Cove, while the Millstone-grit 

 seems to be represented by the thick sandstones underlying the 

 Coal-tield of Richmond County. (Journal of Geological Society, 

 vol. v. ; Acadian Geology, p. 390 et seq.) 



In Northern Cape Breton, from the Cape Dauphin section, as 



* Journal Geol. Society, vol. i. p. 329. 



