41 



108.5 m. North of the crossing of the Severn river 



174.1 km. farming land almost disappears occurring only 



in small scattered areas. 



This Laurentian area stretches northward 



continuously along this route for 150 miles 



(240 km.). The Laurentian consists chiefly 



of dark grey micaceous and reddish granitic 



gneisses with dikes of red granite or pegmatite. 



120. m. Bala is the western gateway to the Muskoka 



193. km. lakes district, famous as a resort for tourists. 



132. m. Altitude 742 ft. (226. m.) Muskoka, a divis- 



212.4 km. ional point, is on Lake Joseph, one of the largest 



of the Muskoka lakes. 

 155. m. At Parry Sound there is a splendid view of 



249.4 km. Georgian Bay from the train as it crosses the 



1,700-foot (518 m.) steel viaduct which is 120 



feet (36.6 m.) above the Seguin river. (518 m.) 



181. m. Another view of Georgian Bay is obtained 



291.2 km. from Point au Baril. 



195. m. Altitude 575 (175.3 m.). Byng Inlet is 



313.7 km. located on an arm of Georgian Bay. At this 

 point there are extensive lumbering operations. 



This region of Laurentian rocks is a striking 

 peneplain with little soil and numerous clear- 

 water lakes and swift running streams. The 

 marks of glaciation are everywhere seen. 

 255. m. Fragmental, pre-Cambrian, rocks are first 



410.3 km. observed two miles south of Romford Junction. 



They consist of layered quartzite. At Romford 

 the quartzite strikes east and west and dips 45 

 degrees S. 



On the north shore of Ramsay lake, three 

 and a half miles west of Romford, a comglom- 

 erate, which rests unconformably on the quartz- 

 ite, is exposed in the railway cuttings. It out- 

 262. m. crops along the lake and railway to the town of 



421.5 km. Sudbury. 



