PLATE IV. 



Figure 14 (page 30) represents in plan a "ilioiite" dike witli a tongue extended 

 into tlie schist. Ligiit-house Point, ilarquotte. 



Fir.UKE 15 (page 36) shows in plan the line of juiietion ol" a " diorite " with the 

 seliist. Quarry near Light-house, Marquette. 



FiouRi-: 16 (pages 36, 38) shows in plan tlie relations of a felsite, represented on 

 tlie right of the figure hy angular marks, to a later "diorite" dike and to the schist. 

 The '* diorite" cuts and faults the felsito, hut as the portion to the left of the "dio- 

 rite" is under the waters of the lake, the writer is not sure of the accuracy of tliat 

 portion of tlie figure. 



FluuuFi 18 (pEige 41) shows in plan tlie lino of junction hctweeu the "diorite" and 

 schist. East of Ishpenang. 



FiGUJ^K 19 (page 41) shows in plan the lijie of contact between the " diorite " and 

 schist, witii an enclosed fragment of schist in the "diorite." Northeast of the 

 Clevcliuid Mine, Ishpeming. 



FiauuE 20 (page 41) is a section, chiefly ideal, showing the supposed relations of 

 the " diorite " dike to the adjacent schist, at the same locality as Fig. 19. 



Fjoure 21 (page 41) represents in plan the line of junction hetween the " diorite" 

 and schist. Northeast of tlie Cleveland Mine, Ishpeming. 



