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PLATE n. 



Figure 7 (pago 31) rcprosciits n, section of a dike of iron ore extending across tlic 

 lamination of the schist. Jackson Mine, Negannee. 



FiauuE 8 (pages 81, 32) represents in section the relationn of a dccontposed hema- 

 tite (" soft hematite") to tlie schist. In tliis case the curvature and dislocation of 

 the schist by the npthrust of the ore is well shown, as represented along the curve 

 h, c. Of our own knowledge we cannot state that the part a belongs to the hematite 

 on the riglitj as i-cprosented. Jackson Mine, Negaunee. 



Ei(;i;uE 9 (page 32) showy a section of jasper and ore intniding in a wedge- 

 shaped mass obli^ptely through the scliist. Jackson Mine, Negaunee. 



Figure 11 {page 32) represents in section the intrusion of ore m a dike of varying 

 dimensions between an<l across the laminae of the schist, bending them In different 

 directions, as shown to a certain extent in the figure. Jackson Mine, Negannee. 





J 





9 



7, 



