THE GEOLOGICAL AND NATURAL HISTORY SURVEY OP MINNESOTA. 



N. H. WINOHELL, STATK GEOI>OIHST. 



1898-1900. 



THE 



GEOLOGY OF MINNESOTA. 



VOL. V OF THE FINAL REPORT. 



STRUCTURAL AND PETROGRAPHIC GEOLOGY OF THE 

 TACONIC AND ARCHEAN. 



BY N. H. WINCHELL, 



ASSISTED BY U. S. GRANT. 



SUBMITTED SEPTEMBER 1, 1899, AND PUBLISHED UNDER THE DIRECTION OF THE 

 BOARD OF REGENTS OF THE UNIVERSITY. 



ILLUSTRATED BY SIX PLATES AND FIFTY-FIVE FIGURES. 



ST. PAUL, MINN. 



THE PIONEER PRESS CO., PRINTERS. 

 1900. 



