369 



ANNOTATED GUIDE. 



(Dauphin to Winnipeg.) 



Miles and 



Kilometres 



from Winnipeg 



177-8 m. Dauphin — Altitude 957 ft. (287m.). Dau- 

 286 km. phin lies about 177 miles (286 km.) northwest 

 of Winnipeg, and is situated just to the east 

 of the first prairie escarpment which marks 

 the boundary between the flat floored valley 

 of glacial Lake Agassiz and the second prairie 

 steppe. This escarpment, in its southern ex- 

 tension to the southwest of Ochre, is known as 

 Riding mountains, and continues northwards 

 under the name of Duck and Porcupine moun- 

 tains, the three groups being separated by the 

 cross valleys of Valley and Swan rivers. The 

 escarpment has been formed by aqueous erosion 

 of the almost horizontal Cretaceous rocks 

 overlying the Palaeozoic which forms the major 

 portion of the bed rock floor of Lake Agassiz. 

 Between Dauphin and Winnipeg the railway 

 crosses the following series. From Dauphin 

 to Ochre the road is underlain by the Dakota 

 series, succeeded by Devonian limestone which 

 extends to Makinak. Between Makinak and 

 Laurier the railway again crosses the Dakota 

 and the approximate contact between the 

 Benton and Dakota is about six miles (9-6 km.) 

 140 m. McCreary — north of McCreary. Be- 



225 km. tween McCreary and 



92-6 m. Gladstone — Gladstone the country 



149 km. is underlain by the Ben- 



55-5 m. Portage la Prairie — ton shales, succeeded at 

 89 km. the latter point by the 



Dakota sandstone, the lowest series of the 

 Cretaceous, which extends as far as Beaver. 

 From Beaver to Portage la Prairie the under- 

 lying rock is Devonian. East of Oakville 

 toward White Plains the country is underlain 

 by the Silurian, no outcrops, however, occurring 

 adjacent to the railway. 



From Headingly to Winnipeg, the underlying 

 rock is Ordovician limestone and shales, 

 o m. Winnipeg — Altitude 761 ft. (232 m.). 



o km. 



