VII 



PART II. THE CEMENT RESOURCES OF ALABAMA, by 



Eugene A. Smith 61 



CHAPTER I. 



PAGE. 



The Portland Cement Materials of Northern Alabama 61 



Available Limestones 62 



General Geology 62 



Lower Carboniferous 62 



Trenton Limestones 63 



Marbles 66 



The Clays 66 



Coal Measures 67 



Lower Carboniferous 67 



Lower Silurian and Cambrian 68 



Cretaceous 68 



Table A Analyses of Lower Carboniferous Limestones. . 71 



Table B Analyses of Trenton Limestones 72 



Table C Analyses of Crystalline Marbles 73 



Table D Analyses of Clays Paleozoic and Lower Cre- 

 taceous 74 



CHAPTER IT. 



The Portland Cement Materials of Central and Southern Alabama 76 



The Selma Chalk, or Rotten Limestone 76 



Geological Horizon 76 



General Description 77 



Details of Localities 79 



Table E Analyses of Cretaceous Limestones 84 



The St. Stephens Limestone 86 



General Description 86 



Details of Localities 87 



St. Stephens 87 



Oven Bluff 88 



Localities along line of the Southern R. R 88 



Along Alabama River 89 



Between Alabama River and the Main Line of 



the Louisville & Nashville Railroad 90 



On the Main Line of the L. & N. R.R 90 



Table F Analyses of Tertiary Limestones 92 



Table G Analyses of Clays (Cretaceous and Terti- 

 ary) and Cement 93 



