THE GEOLOGY OF MINNESOTA. 



[Grand divisions of the coast line . 



Later Cabotian surface flows: 



Duluth to Splitrock river. 



Grand Marias to Brule river (with red rock). 

 Manitou flows [and Puckwunge conglomerate]: 



Baptism river to Grand Marias. 



Deronda bay to Grand Portage. 



