PLATE I. 



Figure 1 (page 30) represents the contact of the jasper and ore on the left hand 

 with the schist on the right. This section shows the relations of the banding of the 

 jasper to the line of junction. Lake Superior Mine, Ishpeming. 



Figure 2 (page 30) represents in plan the projection of the banded jasper on the 

 left into the schist on the right, the banding running parallel to the walls. Lake 

 Superior Mine, Ishpeming. 



Figure 3 (page 30) represents in section a dike of very fair hematite ore, extend- 

 ing across the lamination of the schist. Lake Superior Mine, Ishpeming. 



Figure 4 (page 31 ) is a section showing the relations of the branching dikes of 

 hematite to the schist. Cleveland Mine, Ishpeming. 



Figure 5 (page 31) shows in section the relation of the jasper and ore to the un- 

 derlying schist. Jackson Mine, Negaunee. 



Figure 6 (page 31) shows in section the relations of the hematite to the schist. 

 The hematite projects in a large knob-like mass up into the schist, and is connected 

 with the main body of ore below. Jackson Mine, Negaunee. 



