4 CONTENTS AND ILLUSTRATIONS. 
Mineral resources of Mississippi — Continued. Page. 
Cement materials, by Edwin C. Eckel 71 
Portland cement 71 
Cement materials in general 72 
Essential conditions 72 
Chemical composition. 73 
Physical composition 74 
Amount available 74 
Location with respect to transportation routes 74 
Location with respect to fuel supplies 74 
Location with respect to markets 75 
Cost of equipment and erection 75 
Total capital required 75 
Cement materials in Mississippi 75 
Mississippian (Lower Carboniferous) limestones 76 
Cretaceous limestone (Selma chalk or rotten limestone) 76 
Tertiary limestone (Vicksburg limestone) 84 
Building stone 85 
Road materials 85 
Gravel or shingle 85 
Burned clay 86 
Metalliferous ores 87 
Glass sand and silica 87 
Oil and gas 87 
Coal and lignite 87 
Ocher 89 
Phosphates, greensands, marls, and other fertilizers. 89 
Mineral waters 90 
Index 93 
ILLUSTRATIONS. 
Page. 
Plate I. Geologic and contour map of Mississippi 6 
II. A, Outcrop of Vicksburg limestone at Rock Cut 1 mile west of Clinton; 
B, Tuscaloosa sands near Iuka 12 
III. A, Selma chalk bluff, Macon; B, Loess bluff, Yazoo City 18 
IV. A, Bed of glass sand on Pearl River near Byram; B, Ledge of Tallahatta 
quartzite, Hoffman 32 
Fig. 1. Cross section from mouth of Yellow Creek to Mingo 7 
2. Cross section from the Alabama line to Mississippi River 8 
3. Cross section from West Point to Greenville 8 
4. Cross section from Gattman to Fort Adams 9 
5. Cross section from Scranton to Tennessee River 9 
