THE PROTEROZOIC ERA. 



191 





1892 



1893 



1894 



1895 



1896 



Vermilion 



1,226,220 

 2,848,552 

 2,402,195 

 3,058,176 

 29,245 



815,735 



2,064,827 



1,563,049 



1,466,815 



684,194 



1,055,229 

 1,935,379 

 1,255,255 

 1,523,451 

 1,913,234 



1,027,103 

 1,982,080 

 1,794,970 

 2,625,475 

 2,839,350 



1,200,907 



Marquette 



2,418,840 



Menominee 



Gogebic 



1,763,235 

 2,100,398 



Mesabi 



3,082,973 







Total 



9,564,388 



6,594,620 



7,682,548 



10,268,978 



10,566,359 





1897 



1898 



1899 



1900 



1901 



Vermilion 



1,381,278 

 2,673,785 

 1,767,220 

 2,163,088 

 4,220,151 



1,125,538 



2,987,930 

 2,275,664 

 2,552,205 

 4,837,971 



1,643,984 

 3,634,596 

 3,281,422 

 2,725,648 

 6,517,305 



1,675,949 

 3,945,068 

 3,680,738 

 3,104,033 

 8,158,450 



1,805,996 



Marquette 



3,597,089 



Menominee 



Gogebic 



3,679,408 

 3,041,869 



Mesabi 



9,303,541 







Total 



12,205,522 



13,779,308 



17,802,955 



20,564,238 



21,445,903 



Reference has already been made on preceding pages (p. 150 and 

 p. 176) to the origin of the ores, and to the literature (p. 179) bearing 



SCSBgU 





mas* **i<;z&"&* d w&i*jm 



Fig 73. Fig. 74. 



Figs. 73 and 74. — Figures showing deformation and disruption as illustrated by 

 specimens of jaspilite ore from Jasper Bluff, Ishpeming, Mich. (Van Hise, Bayley, 

 and Smyth, Mono. XXVIII, U. S. Geol. Surv.) 



on the subject. Figs. 73 and 74 illustrate on a large scale the association 

 of iron ore and jaspilite in the Marquette region, and at the same 



