RESOURCES OF SOUTHERN ALABAMA. 



GENERAL DISCUSSION 



In the following pages the various kinds of resources 

 will be taken up one after another for the area as a whole, 

 and illustrated as far as possible by graphs and tables which 

 will serve to facilitate comparison between different regions 

 and bring out some fundamental general principles. Most 

 of the facts will be the same as have already been presented 

 in the regional descriptions, but being arranged in an en- 

 tirely different order, the repetition involved probably will 

 not be objectionable. In most of the tables from here on the 

 highest number in each line is printed in heavy type, so that 

 one can run down the columns and see at a glance what 

 each region leads in. (But for the typographical impracti- 

 cability of using three kinds of type in the same line, the 

 lowest figures would have been printed in italics, for a simi- 

 lar reason.) 



Stratigraphy. 



The area under consideration includes strata ranging 

 in age from late Cretaceous to Recent, lying one above an- 

 other in the order shown in the following synopsis. 



Geological formations of southern Alabama, in descending order. 



Recent. 



Quaternary. Pleistocene. 

 f Pliocene? 

 Miocene 



Dunes, marshes, alluvium, etc. 

 River terraces and second bottoms. 



Tertiary 



Oligocene? 



Eocene 



Cretaceous? 



Citronelle or Grand Gulf clays and sands. 

 (Some marine Miocene penetrated in deep 

 wells, but not recognized at the surface.) 

 St. Stephens white limestone. 



(Lower part now referred to Jackson di- 

 vision of the Eocene.) 



Gosport (greensand) 

 f Claiborne j Lisbon 



Tallahatta (Buhrstone) 

 Hatchetigbee 

 Wilcox, or Bashi, or Wood's Bluff 



Chickasaw j Tuscahoma, or Bell's 

 (Lignitic) Landing 



Nanafalia 

 Naheola, or Matthews 



Landing 



Sucarnochee, or Black 

 Midway j Bluff 



I Clayton limestone, includ- 

 ing "Nautilus rock" and 

 "Turritella rock." 

 Providence sand 



