APPENDIX. 



551 



Section in Northeast Alabama and Northwest Georgia. 1 



Names of Formations. 



' Summit removed 

 erosion. 



Walden sandstone. 



Thickness 

 in Feet. 



500 ± 



Characteristics. 



Coarse sandstone and sandy shale; beds of 

 coal and fire-clay. 



S Lookout sandstone. 



60-570 



2. Conglomerate with massive sandstone. 

 1. Sandy shale with coal and fire-clay. 



Bangor limestone. 



300 



Blue, crinoidal, cherty limestone. 



Oxmoor sandstone. 

 ■~~;v. Unconformity- 

 Floyd shale. 



White and brown sandstone and conglomerate. 



Black, carbonaceous, with occasional beds of 

 crinoidal limestone. 



Fort Payne chert. 



20-200 



Bedded chert and limestone. 



Chattanooga shale. 



0-22 



Black, carbonaceous. 



Armuchee chert. 



— <■ Unconformity -n-~-n- 



Rockwood formation. 



0-40 



1000-1500 





Chickamauga lime- 

 stone. 



700-1500 



Rusty, sandy chert. 



White, brown, and purple sandstone and 

 sandy shale, with beds of red f ossiferous 

 hematite. 



Blue flaggy limestone, sometimes purple and 

 mottled, earthy towards the top. Heavy 

 chert conglomerate at the base in places. 



as 



.2 i Knox dolomite. 



1500-4000 



Dolomite, white, gray, or light-blue, generally 

 granular and massive; containing nodules 

 and layers of chert. 



aj . [ Conasauga forma- 

 ts g | I tion. 

 3^ Base not exposed. 



1000 + 



2. Greenish siliceous shale and micaceous 



sandstone. 

 1. Olive clay shale. 



Strata much folded and faulted. 



1 The two youngest formations in this section are taken from the Gadsden (Ala.) folio, the others 

 from the Rome (Ga.-Ala.) folio. Hayes. U. S. Geol. Surv. In the folio, Ordovician and Silurian 

 are classed together under the name Silurian. 



