ALABAMA 131 



Before taking up consideration of the Warrior coal field, one must 

 record the features of isolated fields lying toward the east in position 

 comparable with that of the Southern and Middle anthracite fields of 

 Pennsylvania. These are Lookout mountain, occupying a synclinal 

 extending from the Tennessee line across northwest Georgia into Ala- 

 bama and terminating near Gadsden ; the Cahaba field, beginning 20 

 miles southwest from Gadsden and extending about 40 miles in almost 

 direct continuation of the Lookout strike, and finalty the Coosa coal 

 field, southeast from the Cahaba field and about 37 miles long. 



The Lookout Mountain coal fields beginning in Hamilton county of 

 Tennessee, passes southwest across Dade and Walker of Georgia, De 

 Kalb, Cherokee, and Etowah of Alabama, and terminates near the Coosa 

 river. As the coal beds are of comparatively little importance, detailed 

 information is scanty. 



Professor Safford's section at the north end shows 



Feet 



1. Upper conglomerate, very heavy, pebbly, estimated. 250 



2. Trace of coal 



3. Fireclay and sandy shale 1 to 39 



4. Conglomerate 37 



5. Shale 23 



6. Trace of coal 



7. Sandy shale and some sandstone 305 to 320 



Professor Spencers section at the same locality differs very little. 

 His measurement gives 225 feet as the thickness of number 1, the bot- 

 tom 50 feet being a massive conglomerate and the upper portion chiefly 

 cross-bedded sandstone. This mass evidently includes both Bonair and 

 Etna, and the underlying coal bed, mined at a few miles farther south, 

 is recognized by Spencer as equivalent to the Etna (Castle Rock) of 

 Raccoon mountain. 



The basin deepens southward, so that within 6 miles from the Ten- 

 nessee line Professor Spencer obtained a long section, thus : 



Feet. Inches. Feet. Inches 



1. Shales and concealed 274 



2. Coal and shale 14 



3. Shale and concealed 43 



4. Sandstone 35 



5. Coal bed 3 6 to 4 6 



6. Sandstone „ . 35 



7. Shales, red, black, blue, variegated, with 



thin limestone 32 



8. Coal bed 1 10 



9. Red and blue shales 105 



