6 9 



13. Van Hise, C. R., and 



Leith, C. K The Pre-Cambrian Geology of 



North America. U.S.G.S., 



Bull. 360, 1909. 

 14 The Geology of the Lake Superior 



Region. U.S.G.S., Mon. 52., 



1911 . 



15. Walcott, C. D Steeprock Lake Fossils. Memoir 



No. 11, Geol. Surv. Branch, 

 Dept. of Mines, Can., 191 1. 



16. Wood, H. H Personal communication. 



ORDOVICIAN AND SILURIAN OF STONY MOUN- 

 TAIN AND STONEWALL, MANITOBA. 



BY 



A. MacLean. 



ORDOVICIAN— STONY MOUNTAIN. 



The Teulon-Arborg branch of the Canadian Pacific 

 Railway runs in a northwesterly direction from the city 

 of Winnipeg 11 miles (17-7 km.) to Stony Mountain, and 

 thence continues to Stonewall about 6 miles (9-6 km.) 

 beyond. 



On leaving Winnipeg, Stony Mountain may be seen 

 rising apparently abruptly from the flat lacustral plain 

 through which the train passes. The flatness of the coun- 

 try is emphasized when it is remembered that the "moun- 

 tain" is 11 miles (17-7 km.) distant and rises only 50 feet 

 (15-2 m.) above the surrounding country. 



Between Winnipeg and the "mountain" no rocks 

 outcrop and, save for the flatness of the lacustral plain, 

 there are no features of physiographic or geological impor- 

 tance. The country is given over to mixed farming, and 

 the production of dairy supplies for Winnipeg. 



