315 



miometres ^^ Comparatively broad and its slope less steeply 

 inclined. 



Below Marshy Hope station the valley, for 

 a distance of i| miles (2-4 km.) continues to be 

 underlain by Silurian strata everywhere con- 

 fined to a narrow strip seldom more than 400 

 yards (365 m.) wide. Beyond this point the 

 valley floor as well as the uplands, are occupied 

 by the Ordovician strata. About 2 miles 

 (3-2 km.) farther, the valley followed by the 

 railway joins the broad valley of the main 

 branch of Barney river. 



17 -2 m. Barney River Station — Alt. 183 ft. (55 -8 



27-3 km. m.). Barney River station is situated on the 

 west side of the comparatively wide valley of 

 Barney river. This valley is underlain by 

 folded and faulted Silurian measures occupying 

 a low area about 2 miles (3-2 km.) broad bound- 

 ed by steep slopes of Ordovician and igneous 

 rocks. The Silurian area extends several miles 

 to the south and then bends to the west. It 

 extends about the same distance to the north to 

 where the Silurian strata are overlapped by 

 Carboniferous measures. The low-lying Sil- 

 urian area is traversed by several streams which 

 unite to form the northward flowing Barney 

 river. 



iS-im. Dewar Station^Alt. 160 ft. (48-8 m.). 



29-1 km. Dewar station is situated at about the centre 

 of the Silurian area at the confluence of the 

 two main branches of Barney river. 



19-2 m. Avondale Station — Alt. 151 ft. (46 m.). 



30 '9 km. Avondale station is on the western side of the 

 Silurian area close to the boundary with the 

 Ordovician. About f mile (o-8 km.) beyond 

 Avondale station, the railway enters an area 

 of Carboniferous strata extending to the sea 

 coast, and turning through an angle of 90°, 

 proceeds westerly near the northern foot of 

 the upland area crossed by the railway and 

 which separates the low-lying Carboniferous 

 area on the north that extends westward to the 

 Pictou coal field and beyond, from the equally 

 low-lying area of the Antigonish Carboniferous 



