BULLtTIN OF THE SCIENTIFIC LABORATORIES OF DeNISON UNIVERSITY. 

 Vol, XII. Article X. March, iqo4. 



THE YELLOW OCHER-DEPOSITS OF THE CAR- 

 TERSVILLE DISTRICT, BARTOW COUNTY, 

 GEORGIA.' 



By Thomas Leonard Watson. 



CONTENTS 



Introduction, 

 Historical Statement, 

 Geology of the District, 



The Weisncr Quartzite, 



Topography, 



Rock Weathering, 

 The Ocher-Deposits, . 



Petrography of the Quartzite, 



Associated Ore-Deposits, . 



Chemical Composition of the Ocher 



Mode of Occurrence of the Ocher 

 In the Fresh Rock, 

 In the Residual Clays, 



Origin of the Ocher, 

 Economic Features, 



■Methods of Mining, 



Preparation of the Ocher, 



Uses, .... 



199 

 200 

 201 

 203 

 205 

 207 

 208 

 209 

 211 

 212 

 213 

 214 



215 

 216 

 218 

 218 



2l8 



221 



Introduction. 



Knowledge of the existence of yellow ocher-deposits in 

 Bartow county, Georgia, dates back to the early mining of 

 manganese- and iron-ores in the vicinity of Cartersville. Sys- 

 tematic mining of the ocher in this area really began, however, 

 probably not longer than a decade back, although the date of 

 its first working is as early as the year 1877. The district has 

 been, for a number of years, one of the principal producers of 

 yellow ocher in the United States ; and at no period of its de- 

 velopment have mining activities been greater and more suc- 

 cessful than at present. 



1 Published by permission of the State Geologist of Georgia. 



Reprinted from Transactions of the American Institute of Mining Engineers. 

 (New York Meeting, October, 1903.) 



