279 



KUomtrrts Great Bras d'Or channel on the far side of 



Boularderie island. 

 II m. Boisdale Station. — Near Boisdale station 



17-7 km. and at intervals beyond, rock cuttings in the 

 red conglomerates and sandstones of the 

 Carboniferous series occur along the railway. 

 The Carboniferous strata continue along the 

 shore for about 5I miles (8-8 km.) or until 

 about opposite the end of Boularderie island, 

 where sedimentary strata, possibly of Cambrian 

 age outcrop near the shore. From this point 

 to Shenacadie station, several miles further on, 

 the Carboniferous strata are confined to a 

 narrow band, and the front of the high ridges of 

 Pre-Cambrian rocks closely approaches the 

 shore. 

 19-8 m. Shenacadie Station. — From Shenacadie 



31-8 km. station onwards to Grand Narrows the railway 

 continues to follow the shore line. Along this 

 stretch the shore is bordered by a narrow strip 

 of strata assigned by Fletcher to the Carboni- 

 ferous Limestone series. These measures on 

 the inland side are bounded by strata of the 

 Conglomerate series occupying a zone that 

 widens southwards at .Grand Narrows to a 

 maximum width of about 3 miles (4-8 km.). 

 The underlying Conglomerate series consists 

 of red conglomerates, sandstones and shales 

 with some bituminous shales, beds of limestone 

 and occasional thin seams of impure coal. 

 The overlying Limestone series contains be- 

 sides variously coloured sandstones and 

 shales, beds of limestone (in places fossiliferous) 

 and beds of gypsum. Presumably the Lime- 

 stone series is to be correlated with the Windsor 

 series. 



The gypsum does not occur in the narrow strip 

 of the Limestone series traversed by the railway 

 but it is present on the opposite shores of Little 

 Bras d'Or lake. The fiat-topped hilly country 

 of the opposite shore is, in part occupied by 

 Pre-Cambrian rocks occurring in two areas but 

 in the main it is occupied by measures of the 

 Conglomerate series lying in a broad anticlinal. 



