TABLE OF CONTENTS. 



PREFACE '. 5 



Location and Area of the Valley ... 7 



Drainage * s 



Topography 10 



Sand Valley 12 



The Central Valley 12 



The Eastern Valley 13 



Straight Mountain 13 



Red Mountain 11 



Sand Mountain 15 



Geological Formations 17 



Carboniferous 17 



Coal Measures . 17 



^Sub-Carboniferous 20 



a. Mountain or Bangor Limestone 20 



b. Oxmoor or Lag range Sandstone 22 



c. Fort Payne Chert, Siliceous Group 23 



Devonian 2-1 



Black Shale 24 



Silurian 25 



1. Clinton or Red Mountain 25 



2. Trenton and Chazv, Pelham Limestone 25 



3. Knox Dolomite 25 



Cambrian 26 



Sparry Limestone or Coosu Shale 2C 



Structure -. 28 



The Great Anticlinal Fold 28 



Transverse Folds 34 



Other Peculiarities of Structure 36 



Absence of Certain Formations on S. E. side of Valley 36 



Comparison of ends of the Valley with Central parts. 37 



Horse-shoe curve of upper end of Valley 38 



End of the Fold 38 



Economic Geologv 39 



Hematites of the Red Mountain or Clinton Formation 39 



Details of Occurrence of Red Ores .... 41 



On Northwestern side of Valley 41 



On Southeastern side 69 



Estimates 87 



Brown Iron Ores Limonites 89 



The First or Lowest Limonite Horizon . . .90 



