Stratigraphy of the Cambro-Silurian Rocks of E. Manitoba. 73 



some respects to the upper part of the Stony Mountain section, but the 

 fossils found are quite distinct. They evidently belong to a higher 

 horizon. The gap in the series is evidently made up of soft shaly beds 

 with possibly some sandstone at the base of the Niagara. 



The section given by Dr. G. M. Dawson for the Rosenfeld well* 

 I would be inclined to interpret as passing through the equivalent of 

 the Stonewall beds as well as the Hudson River, of Stony Mountain, 

 referred by him to the Maquoqueta shales of Wisconsin, and would 

 arrange part after the following : 



7 limestone, - - - - 15 feet' 



8 red shale - - - - 5 feet 



9 grey shale - - - - 10 feet -Niagara. 



10 limestone 30 feet 



11 line grey sandstone, 40 feet 



12-chalky limestone - 30 feet] . Hudson River of St Mountain. 



13 red shale - - - 160 feet J ' 



14 cream colored limestone, 305 feet Winnipeg limestone, Trenton and Galena 



15 red shales - - - - 75 feet \ Winnipeg sandstone and associated 



16 soft sandstone - - ,- 50 feet/ shales. 



This would leave the Hudson River section with a thickness of 

 1 go feet, which is not far from the probable thickness in the southern 

 part of the province as this formation thins out toward the north, and 

 is not seen in the section on either the Little Saskatchewan or Great 

 Saskatchewan rivers. If we had a series containing several successive 

 bads of limestone, there would, in all probability, be something seen of 

 it on the northwest shore of the lake, between Saskatchewan river and 

 Selkirk Island, where we have the Silurian or Niagara beds, and the 

 top of the upper mottled or Galena limestone. On the Little Saskatche- 

 wan the probable representative is in the shales recorded by Dr. Bell at 

 the head of the four mile rapid. A summary, then, of the several beds 

 could be placed in the form of a section, in decending order, giving the 

 total thickness for the Cambro-Silurian of this district, as less than six 

 hundred feet : 



Hudson River Shales 190 feet 



Uppei Mottled Limestone 150 feet 



Cambro-Silurian -J Cat Head Beds 70 leet 



tied 70 feet 



idstone 100 feet 



Lower Mottled 

 \_ Winnipeg Sane 



5S0 feet 



Trans. Royal Society of Canada, \\>1. IV, 1SS6. 



