NUV 



BULLtTIN OF THE SCIENTIFIC LABORATORIES OF DeNISON UNIVERSITY. 



Vol. XII. Article IX. March, iqo4. 



GEOLOGICAL RELATIONS OF THE MANGANESE 

 ORE DEPOSITS OF GEORGIA.' 



By Thom.\.s L. Watson. 



CONTENTS''' 



Page 



Introduction, ..--.... i^g 



Previous work, --.-... i^g 



Distribution of the manganese ores, - - . . i^g 



J. Tlie manganese deposits of the Paleozoic area, - - - 150 



Resume of the geology of the Paleozoic area, - - • 150 



Position, ....... ijo 



Topography, - - - - - - - 150 



Stratigraphy, -----.. 151 



Structure, . . . ... 152 



The Cartersville district, - - - - - 1:54 



The Paleozoic rocks of the Cartersville district on the west side of 



the fault, --..... 155 



The Weisner t[uartzite, ---... 156 



.•\nalysis of the Weisner cjuartzite, 'Cartersville district, - 156 



The Beaver limestone, - - - - - - 157 



The Conasauga shale, - - . . . 157 



Analyses of middle Cambrian shales, Cartersville district. - 158 



The Knox dolomite, .... |jg 



The Older crystalline and metamorphic rocks of the Cartersville dis- 

 trict on the east side of the fault, - - - - 160 



Analysis of granite, Cartersville district, - - 161 



Structural features, ...... i5o 



The manganese ore-deposits of the Cartersville district, - 164 



Mode of occurrence of the ores, - - - - 164 



Depth of the residual decay, . . . . 165 



Kinds of ore, - - - - - - 166 



Associated ore-deposits, .... ^167 



' Published by permission of the State Geologist of Georgia. 



I wish to make acknowledgements to the various excellent maps and pub- 

 li.ations of the U. S. Geol. Survey, by Dr. C. W. Hayes, on the Georgia area; 

 and to the valuable volume on "Manganese," by Dr. R. A. F. Penrose, issued 



by the Arkansas Geol. Survey, all of which have been freely used in the prepa- 

 ration of this jjaper. 



Reprinted froin Transactions of the American Institute of Mining Engineers . 

 (Albany Meeting, February, 1903, 47 pages.) 



'-' Omitted in the original paper. 



