Art. IX.] Watson, Manganese Ore-Deposits of Georgia. 187 



those involved in the accumulation of the ores in their present 

 concentrated form. The process involved in the local accumu- 

 lation was largely one of resolution of the manganese by the 

 acidulated surface-waters and its reprecipitation in another posi- 

 tion in the residual clays. 



The irregular distribution of the ores, both laterally and 

 vertically, in the residual clays ; the frequency with which the 

 ore-bodies are observed to cut across the bedding of the inclos- 



FlG. 18. 



Watsoa 



Section through the Blue Ridge Mine, Fannin Co., Georgia, Showing the Mode 

 of Occurrence of the Manganese and Iron-Ores. 

 A, partially decayed mica-schist, grading into quartz-schist in places ; B, 

 manganese and iron oxides, distributed through the decay of the mica-schist. 

 The black dots and areas are the ores ; C, jasper-like qnartz. 



ing clays, and without regard to orientation in any direction ; 

 the invariable presence of greater or less quantities of included 

 quartz-grains and other particles of siliceous material irregu- 

 larly distributed through the nodules and masses of ore, of the 

 same character as that composing the inclosing clays ; the con- 

 cretionary nodular and stalactitic forms of the ore ; and its pre- 

 vailing tendency to crystalline structure, are the most pro- 

 nounced features of the ores, and are those which would result 

 from such a process of segregation as outlined. That is, they 



