RELATIONS OF SCHIST AND GRANITE. 



371 



present also a phase somewhat different from that which we have been con- 

 templating. In a multitude of cases the schistic fragments are separated by 

 an irregular fracture from the parent mass, and, though their original align- 

 ment with its bedding planes is not impaired, it becomes evident that the 

 intervening gneiss is not strictly an interbedded sheet. See fig. 2.* 



In other cases the schist is more thoroughly disrupted, and the gneiss 

 loses its foliation and assumes a distinctly granitoid character. It insinuates 



32 ^12 it. 



Figure 3. — Relations of Muscovite Schist and Granite, Burntside Lake. 



itself into narrow fissures aud begins to cut the schists in many directions, 

 presenting the aspect of true granitic veins. See fig. 3.f 



In the regions marked m the schist and granite are intimately mixed. 



*See also fi&r. 33, Fifteenth Ann Rep. Minn., p. 290; and fig. 14, " Relations of crystalline rocks at 

 Pelican Lake," Sixteenth Ann. Rep. Minn., p. 451. 



tSee further fig. 30, Fifteenth Ann. Rep. Minn., p. 78; fig. 53, Sixteenth Ann. Rep. Minn., p. 295; and 

 fig. 12, Sixteenth Ann. Rep. Minn., p. 447. 



