296 



TUE MARQUETTE lEON BEARING DISTRICT. 



At several localities for a half mile west of Carp River contacts are 

 also found between the quartzite and the green schist. The quartzite near 

 the contacts is intensely plicated, but wherever an opportunity could be 

 found to get at the junction a sharp contact between the two rocks was 

 invariably discovered. In only one place was the plicated (juartzite found 

 in any other position than on the south slope of the schist. Here it wraps 

 around the east end of a small knob of schist, and is found on the north 

 side with its typical characters. This occurrence is probably explained by 

 regarding the green-schist knob as a headland projecting somewhat diag- 

 onally off from the old shore-line, and therefore giving a bay in which the 



detrital material could be deposited 

 behind the schistose rock. When 

 the two were later upturned to their 

 present inclination the tilting would 

 result in the distribution described. 



At various localities east of Teal 

 Lake (Atlas Sheet XXX) the quartz- 

 ite is found to l)e in contact with 

 the green schist. This may be par- 

 ticularl}' well seen just west of the 

 road running north from Negaunee 

 and east of the gorge of the Carp 

 River. The relations are, however, 

 essentially the same as at the Carp 

 and west of Teal Lake, with the exception that east of the gorge there has 

 been such intense movement near the contact plane that the basal rock has 

 become a schist-conglomerate which closely resembles the much mashed 

 green schist of the Northern Complex. It is difficult to say exactly where 

 the green schist ends and the schist-conglomerate begins. In discriminating 

 l^etween the fragmental and igneous rocks the microscope is frequently 

 of considerable assistance. The igneous character of the green schist in 

 its typical form is plain, while the fragmental character of the quartzite is 

 equally evident ; but close to the contact even the microscope fails to dis- 

 criminate between the igneous rocks and the intensely metamorphosed 



