204 THE VEEMILION IRON-BEAKING DISTRICT. 



and dips 90°. It is exposed for a distance of about 100 paces in an east- 

 west direction. Sontli of the jasper there is massive greenstone. On the 

 north side of the jasper there is a greenstone which has elHpsoidal parting 

 and in places appears tuffaceous. No good sedimentary banding is shown, 

 howeyer. Here, it seems, there was an interbanding of the iron formation 

 with the greenstones, it having been covered up, perhaps, by a flow of 

 lava represented by the ellipsoidal and tuffaceous rock. In the SE. ^ of 

 the SE. ^ of sec. 7, T. 62 N., R. 14 "W"., on what is known as the Eaton 

 property, there is a large exposure of much plicated iron formation which 

 in one place near the shaft has been cut tlu'ough by dikes of granite- 

 porphyry containing large phenocrysts of quartz. The intrusive relation- 

 ship of this porphyry to the jasper can be well seen here. The jasper 

 occupies prominent hills in the midst of an area containing heavy drift 

 deposits which conceal the greater portion of it, but numerous exposures 

 of greenstone north and northwest of the jasper areas indicate that the 

 greenstone at least partially surrounded the iron formation, and, as shown 

 by relations of these rocks elsewhere, underlies the jasper. Just west of 

 the shaft, about 300 paces distant, is a bare knob of greenstone cut through 

 by a dike of granite-poi'phyry which is believed to be a continuation of 

 that cutting the jasper near the shaft. On this bare knob there were 

 observed in some places structures which looked fragmental, making the 

 rock appear as though it were partially a greenstone tuff or a brecciated 

 greenstone. It could not be determined whether this fragmental jDortion 

 of the greenstone was a volcanic tuff or a basal conglomerate lying upon 

 the greenstone and below the iron formation. 



About one-fourth of a mile north of the southeast corner of sec. 1, 

 T. 62 N., R 15 W., there are a number of fairly good exposures of the iron 

 formation. This is here very intimately associated with greenstone, with 

 which it is clearly infolded, both the jasper and the greenstone there being 

 cut by acid dikes. The belt in which this iron-formation material occurs 

 was traced to the north of east by means of a number of discontinuous 

 exposures for about 2J miles. There is a large exposure just north of the 

 little lake on the section line, between sees. 5 and 6, T. 62 N., R. 14 W. 

 It is very much contorted, and represents a southwestward-plunging 

 anticline. Mining has been done at this point to a slight extent, some 

 ore having been brought to the surface, although none has been shipped. 



