Art. X.] Watsox, Vciknc OcJui -Deposits of (jcoi-gia. 201 



in vats du<^ in the ground. 71ic ocher-indu.str\- in (jcorgia 

 properly dates from this year. 



At present, four plants of large size and thoroughly equip- 

 ped are engaged in mining and shipping the ocher in the Car- 

 tersville district : namely, the Georgia Peruvian Ocher Com- 

 pany ; the Cherokee Ocher & Barytes Company ; the Blue 

 Ridge Ocher Company; and the American Ocher Company. The 

 last plant was added in 1902. In every instance the mill for 

 preparing the ocher is located at the mines, thereby reducing 

 the cost of production from what it was in the earl}- period, 

 when mine and mill were separated by a considerable distance. 

 The present plants are all located within two-and-a-half miles of 

 the town of Cartersville, which is the shipping point. 



Several unsuccessful attempts have been made to produce 

 ocher at Rockmart, in the adjoining county, Polk, on the south- 

 west, but each time the venture was abandoned. 



Geology of the District. 



The area here described, as shown on the accompanying 

 map, Fig. i, is limited to the southeastern portion of Bartow 

 county, in northwestern Georgia ; and it lies in the vicinity of 

 the town of Cartersville, from which the district derives its 

 name. It is one of the most productive ore-districts in the 

 Southern Appalachians. Stratigraphically, the area is nearly 

 equally divided between the Paleozoic formations on the west 

 and the older crystalline metamorphic rocks of the Piedmont 

 plateau and the Appalachian mountains on the east. The irregu- 

 lar line separating the two groups of unlike rocks marks the po- 

 sition of the Cartersville fault, which is the most important 

 structural feature in the region. 



As indicated in Fig. i (C, C, C, C), the rocks belong to two 

 geologically distinct groups, which show marked differences as 

 to age and kind. To the west of the fault-line the rocks are 

 sedimentaries, and include quartzites, sandstones, shales, and 

 limestones of Cambro-Silurian age. To the east of the fault- 

 line the rocks are metamorphic crystallines, derived in part from 

 original igneous masses and in part from original sediments. 



