OF THE NORTHWEST. 



G3 



Haifa mile south of the afore-mentioned valley, on the south half of Section 15, 

 Township 7 north, Range 5 west, of the 4th Principal Meridian, Burns and 

 Miller procured about one hundred pounds of lead ore. 



East of the first locality, Hearn and Miller dug sixty feet, and followed an east 

 and west lode, in which they obtained a small quantity of lead ore. 



All these discoveries were made in the Lower Magnesian Limestone, F. 2. 



In the same vicinity, on the south half of Sections 33, 34, and 35, Township 8 

 north, Range 5 west, of the 4th Principal Meridian, there are vestiges of ancient 

 diggings wrought by the aborigines. 



Between Yellow River and the Upper Iowa, Mr. A. L. Martin found several 

 pieces of lead ore on the surface, weighing four to five ounces, and observed a 

 place where the Indians must have excavated the hill in search of this ore. 



On the Upper Iowa River, in several places east and west, crevices were observed 

 in the Lower Magnesian Limestone, presenting symptoms of being galeniferous, 

 especially at a bend of that river where the stream flows over solid ledges of Lower 

 Magnesian Limestone, with bold bluffs of the same on the south side. This place 

 is eight or ten miles below the Big Spring, and by water, about sixty miles above 

 the confluence of the Upper Iowa with the Mississippi. 



On the Wazi-oju, Mr. B. C. Macy, of the geological corps, saw a vein of lead ore 

 of four inches in width, bearing nearly east and Avest, and ranging, apparently for 

 the distance of one-half to three-quarters of a mile, through the Lower Magnesian 

 Limestone. 



To the above may be added some interesting discoveries made in this formation, 

 between Plum and Pine Creeks, tributaries of the Kickapoo. Between these 

 streams, in the southwest corner of Section 26, Township 8 north, Range 5 west, 

 of the 4th Principal Meridian, on the southeast slope of a hill, copper ore, associated 

 with hematite, was found, and traced into a crevice traversing the lower cherty 

 beds of this formation. On the opposite side of this hill no copper has yet been 

 noticed; but, four miles beyond, in a north-northwest direction, on the slope of 

 another hill of about the same elevation, similar copper ore was picked up.* 



About twenty miles north of the mouth of the Kickapoo, four miles west of it, 

 and seven miles east of the copper range heretofore mentioned, in the valley of 

 Hale's Creek, lead ore has been obtained, apparently connected Avith an east and 

 west lode. 



A heavy lode of lead ore is said also to have been discovered on the Half Breed 

 tract, near the Wazi-oju, by Joseph Bison. This vein is represented as being from 

 ten inches to a foot wide, and filled with galena embedded in the usual matrix of 

 red, tenacious clay. 



Two miles below Bad Axe River, Mr. Pratten, of the geological corps, found 

 lead ore attached to calcareous spar, which evidently fell from the cliff of the 

 Lower Magnesian Limestone above the spot where the specimen was picked up. 



In the Winnebago Reserve, not far from the Iowa River, and a few miles north- 

 west of the small town of Lansing, lead ore was found, in small quantities, chiefly 

 in pockets and cavities. 



* Tlio samples of this ore which I analyzed yielded from 17 to 23 per cent, of copper. 



