vi 



Page. 



Pyrite 44 



Dolomite 44 



Methods employed in Making Clay Analyses 45 



Rational Analysis of Clay 60 



Classification of Clays 57 



Mining and Preparation of Clays 59 



Prospecting for Clays 59 



Mining of Clays 60 



Mining of Kaolin 61 



Washing of Kaolin 62 



II. GEOLOGICAL RELATIONS OF THE CLAYS OF ALABAMA, BY EUGENE A. 



SMITH, PH. D 69 



Archaean and Algonkian , 70 



Cambrian and Silurian Formations 73 



Subcarboniferous Formation 77 



Coal Measures 80 



Cretaceous Formation 81 



Russell and Macon Counties '. 87 



Elmore and Autauga Counties 88 



Bibb County 90 



Tuscaloosa County 92 



Pickens County 97 



Lamar County 98 



Fayette County 101 



Marion County 104 



Franklin County 107 



Colbert County 109 



Lauderdale County Ill 



Tertiary 112 



III. PRELIMINARY REPORT ON THE PHYSICAL AND CHEMICAL PROPERTIES OF THE 



CLAYS OF ALABAMA, BY HEINRICH RIES, PH. D 114 



China Clays 115 



Rock Run, Cherokee County 118 



Gadsden, Etowah County 119 



Kymulga, Talladega County 121 



Eureka Mine, DeKalb County 122 



" " 123 



Fort Payne 125 



Chalk Bluff, Marion County 126 



" " ; 127 



Near Chalk Bluff, Marion County 127 



Pearce's Mill, Marion County 128 



Pegram, Colbert County 129 



Fire Clays 130 



Peaceburg, Calhoun County 134 



Oxanna, " " 135 



