Excursion C3 



Legend 



j K4- I Pierre shale 



K3 I Niobrara, shale 

 KZ Benton shale 

 I Kt Dakota, sandstone 



5 I DZ I Ma.nitoba.ri It 



liSil Winnipegosan dolomite 



■ 'I [Stringo&phaius burton, fauna) 



S Silurian 



Geological Survey, Canada. 



Dawson Bay 



Miles 



