ANALYSIS OF BENTONITE 



531 



in the quarry by 2 feet of yellow, earthy, mud-cracked limestone. An 

 analysis^ of the bentonite is as follows : 



Complete Analysis of Bentonite, Bragg's Quarry, East Chattanooga 



Per cent 



Si02 51.88 



AI2O3 19.13 



Total Fe as Fe203 3.03 



CaO 4.54 



4.86 



MgO 



Na 



O 



1.56 

 1.94 

 .48 

 .005 



Ti02 



Cr 



CO2 2.94 



H,0 expelled at 100-110 degrees centigrade 3 . 56 



H2O expelled at 150-160 degrees centigrade 72 



HoO expelled at 200-210 degrees centigrade .30 



HO expelled at red heat 5 . 24 



Figure 3. — Diagrammatic Sketch of west Side of IsaJ)ella Stewart Bauxite Mine 



A detailed description of the Isabella Stewart mine of the Kalbfleisch 

 Chemical Corporation, lying five-eighths of a mile west of the bentonite 



^ All analyses on this and succeeding pages were made by D. F. Farrar, chemist, 

 Tennessee Geological Survey. 



