44 GEOLOGICAL REPORT. 



&quot; In Jefferson County, lead occurs at a number of localities. 



&quot; Gopher Mines are located on a high ridge of 2d Magnesian 

 Limestone, in S.E. qr. of Sec. 34, T. 41, R. 5 E. They were 

 worked by a company, and have yielded about 120,000 pounds 

 of ore. A great deal of heavy and calc spar was found mingled 

 with the lead at most of the shafts and excavations. 



&quot; Tarpley Mines, situated in N.E. qr. of Sec. 11, T. 38, R. 4 E., 

 have been fully described by Dr. Litton, in the 2d Report of the 

 Geological Survey. Since his visit, however, during the year 

 1855, about 123,000 pounds of ore were raised at these mines, 

 and in the spring of 1856 they were worked with eight hands, 

 and yielded 35,000 pounds. 



&quot;Poston and Tyler s Mines, located in the west half of Sec. 

 11, T. 38, R. 4 E., yielded during the year 1855 upwards of 

 90,000 pounds of ore. According to Mr. Daly, every part of 

 Sec. 11 contains more or less lead. At the Daly Diggings, at 

 the head of the Plattin, 60,000 pounds of ore were obtained 

 from a single shaft in 1846-7. 



&quot;Mammoth and Sandy Mines have yielded large amounts 

 of lead, and a particular account of them is given by Dr. A. 

 Litton, in the 2d Report of the Geological Survey. 



&quot; Howe s Diggings, situated in Sees. 3 and 4, T. 39, R. 6 E., 

 were discovered in 1840, and have since yielded about 150,000 

 pounds of ore, most of which was obtained from shallow ex 

 cavations. It was chiefly smelted at the furnace at Sandy Mines. 



&quot; Yankee Diggings, situated in Sec. 6, T. 39, R. 6 E. The 

 ore here exists in a fissure whose direction is nearly north and 

 south, and which contains a great deal of heavy and calc spar 

 with some sulplmret of iron. Most of the ore obtained here 

 was from a shaft about seventy feet in depth. 



&quot; Me Cormick s Diggings, situated about three-fourths of a 

 mile south of Yankee Diggings, yielded 13,582 pounds of ore 

 during the year 1855. A number of shafts have been sunk 

 here, some of them more than thirty years ago. 



&quot;Lead has also been found at several other localities in this 

 vicinity ; on Mr. Berry s land upwards of 500 pounds of ore 

 have been raised. 



