28l 



Ki'iometres shorc thcsc arcas are narrow and are limited 

 inland by the Carboniferous Conglomerate 

 series or by detached areas of Pre-Cambrian 

 rocks. The Pre-Cambrian strata form bold 

 ridges and hills, in some cases only a couple of 

 miles in diameter, which in some instances rise 

 to heights of i,ooo feet (300 m.). In general, 

 the strata of the Conglomerate series surround 

 the high Pre-Cambrian areas, and in places the 

 Carboniferous strata form uplands comparable 

 in heights with those occupied by the Pre- 

 Cambrian. 



Westward from McKinnon Harbour station, 

 the railway at first follows close to the shores of 

 the bay, then leaves the shore for a space, and 

 afterwards again approaches the water; beyond 

 this the railway strikes inland and after a 

 distance of about i| miles (2 -4 km.) again comes 

 to the shores of the lake towards the head of an 

 inlet which the railway crosses. Along this 

 portion of the railway, cuts and natural expo- 

 sures of gypsum are visible at intervals, while 

 in other places, the minutely broken and 

 irregular topography suggests that considerable 

 areas are underlain by gypsum. At intervals, 

 views are afforded of the numerous low islands 

 and the inlets occurring in this part of the lake. 

 To the south, across a wide bay studded with 

 islands, may be seen the bold ridge of North 

 Mountain formed of Pre-Cambrian strata 

 rising abruptly to heights of 500 to 700 feet 

 (150 to 215 m.) above the low, encircling Carbon- 

 iferous areas. 



About 4I miles (7-2 km.) beyond McKinnon 

 Harbour station, the railway as already men- 

 tioned, crosses an inlet. This inlet extends 

 inland beyond the railway for about i mile (i -6 

 km.). The head of this inlet is separated from 

 St. Patrick channel by a space of low-lying 

 ground only about 400 yards (360 m.) wide 

 and as the railway crosses the valley of the inlet 

 glimpses are obtainable of the high ridges on 

 the north side of St. Patrick channel. A short 

 distance beyond this. Alba station is reached. 



