MURPHREE'S VALLEY/, ECONOMIC GEOLOGY. 95 



very promising exposure of brown ore belonging to the second 

 horizon. While some of it is very cherty and sandy, yet 

 much of it is good. No openings had been made on the 

 deposit to show the condition of the ore underground, or to 

 what extent it may Joe mixed with rock or gravel, or the 

 proportion of ore to the mass of matter. These matters 

 could not be determined by inspection of the surface ; yet 

 the appearances indicate that it is a valuable though not a 

 large body of ore. 



The same dre is again seen in S. 14, T. 12, R. 2, E. It is 

 there in much larger masses and greater volume, and again 

 in S. 22 of the same township, where it is largely developed. 

 High, red, ochery hills, apparently carrying brown ore, extend 

 still farther to the S. W. and W. But little ore was seen* 

 however, on their surface, and notwithstanding their irony 

 appearance they may not be ore bearing. 



Another small body of brown ore is found about one mile 

 to the west of the last locality, in S. 21, T. 12, R. 2, E. It is 

 not a thick deposit, and may not be valuable. It belongs 

 higher up in the series. It is in the third Limonite horizon, 

 and the absence of the Birmingham Breccia at this place 

 puts it near the top of the Knox Dolomite. 



In the N. W. corner of S. 28, same Tp., this stratum of 

 brown ore again is found in large sized masses, though most 

 of it impure and cherty. And in several places in S. 29 it 

 is found in good sized pieces of good ore. But probably no 

 body of it is sufficiently large to be valuable. Near the S. W. 

 corner of this section there is a prominent point with its sur- 

 face nearly covered with limonite. The ore is of good qual- 

 ity, and it is probably the best show of ore that is known at 

 this horizon. 



One mile to the south of this is the great Limonite Ore 

 deposit of the valley, once known as "Iron Ridge" but now 

 designated and known as 



CHAMPION MINES. 



This great deposit of brown ore belongs to the 1st Lim- 

 onite Horizon, lying at the very b^se of the Silurian. Min- 



