284 



Miles and 

 Kilometres. 



6o-6 m. West Bay Road Station — Alt. 214 ft. (65-2 



97-5 km. m.)- West Bay Road station is situated at the 

 southern end of the Pre- Cambrian area of North 

 Mountain. Beyond this station, as the railway 

 descends to the crossing of River Inhabitants, 

 the higher ground on the east is occupied by 

 Millstone Grit. Where the railway crosses the 

 river, the waters are practically at sea level. 

 Beyond the river crossing the railway ascends the 

 long slope on the southwestern side of the river 

 valley underlain by the Limestone series and 

 passes along the eastern side of two small 

 lakes. About if miles (2-4 km.) beyond the 

 second of the two lakes the railway enters an 

 area occupied by Millstone Grit and in part by 

 strata belonging to the Coal Measures. From 

 this point onwards the railway descends to 

 Point Tupper on Canso strait. As the descent 

 is made an extensive view is afforded of the 

 upland country of the mainland across the 

 straits. This upland area is chiefly underlain 

 by strata mapped as Devonian and which are 

 in part at least the equivalents of the Rivers- 

 dale-Union series. A high, isolated hill known 

 as Cape Porcupine rising on the western side of 

 the straits, is occupied by Pre-Cambrian strata. 

 As the railway nears the shore, rock cuttings 

 in variously coloured shales and sandstones are 

 common. 



The Carboniferous area traversed by the 

 railway from the River Inhabitants valley to 

 Point Tupper includes a series of strata having 

 a thickness of at least 19,000 feet (5,800 m.). 

 The strata are traversed by strong faults and 

 doubtless many minor faults are also present. 

 The measures are usually inclined at rather high 

 angles and apparently lie in open folds of large 

 dimensions. Both on the west and east occur 

 large areas of so-called Devonian. Sandstones 

 and dark shale that have been correlated with 

 the Horton series occur at the base of the mea- 

 sures that have been definitely assigned to the 



