^11 



Miles and narrow band southeastward throuehout the 



Kilometres. ,11 1 c \ t->'iii-ii 



whole length ot the Boisdale hills. 



At Young point, about i^ miles (2-4 km.) 

 from George River station, Long island becomes 

 visible from the railway. A small island lying 

 north of Long island is composed of horizontal 

 limestone of the Carboniferous Limestone series. 

 Long island which has a length of about 2\ miles 

 (4 km.), is in part occupied by disturbed 

 sedimentary beds, in part by fine-grained igneous 

 rocks possibly partly extrusive and partly of 

 intrusive origin. The sedimentary strata of 

 Long island are in part at least, of Cambrian 

 age and as described by Matthew, the igneous 

 rocks are of the same age. 



Beyond Young point the railway closely fol- 

 lows the shore of the sound separating Long 

 island from the mainland. The bold, eastern 

 rock face of Long island is formed almost entirely 

 of igneous rocks. On the mainland, along the 

 railway are cuttings in dark Cambrian slates and 

 sandstones closely folded along north-south 

 axes. The Cambrian strata extend to the top 

 of the high, steep ridge which rises almost 

 directly from the shore to altitudes of 600 to 

 700 feet (180 to 215 m.). About opposite the 

 southern end of Long island, the Pre-Cambrian 

 strata which bound the Cambrian on the east, 

 approach closely to the shore and then recede. 

 5-6 m. Barrachois Station. — Just south of Barra- 



8-9 km. chois station the railway passes through a long 

 cutting in dark slates. These slates are appar- 

 ently unfossiliferous but on lithological and 

 structural grounds are supposed by Matthew 

 to belong to the Bretonian and to be of Upper 

 Cambrian age. A short distance beyond, 

 the railway crosses the mouth of McLeod brook. 

 The Cambrian measures extend southward up 

 the valley of McLeod brook as a narrow band 

 about I mile (o-8 km.) wide and bounded on 

 both sides by Pre-Cambrian rocks. This band 

 of Cambrian strata continues southward across 

 a low divide and thence down the valley of 

 Indian brook almost to the shore of East bay 



