GENERAL SECTION ON THE CHATTAHOOCHEE. 601 



Feet. 

 8 — Laminated dark gray clays, with masses of yellow sands distributed at 



irregular intervals throughout the stratum ; best developed just above 



Uchee creek, Alabama 25 



9 — Yellow and white sands, with thin seams of lignitic sand and an occasional 



"bunch " of gray laminated clay. These sands are exposed in a bluff 



about 100 yards from the river, just south of Rooney's Mill creek, 



Georgia 50 



10 — Quartzose conglomerate much like that at Havana, Hale county, Alabama ; 

 forms the shoal at Beden's rock and the bluff at Hatcher's lower landing ; 

 merges gradually into a yellow sand 50 



11 — Yellow sand and gray clay, containing bits of leaves. This stratum and 



the following are seen at Chimney bluff, Georgia GO 



12 — Light-yellow and white sands, containing beds of well-rounded quartzose 

 pebbles, sometimes 20 feet thick. Lignitized logs can be seen protrud- 

 ing from the bluffs. The sands contain a small Ex^gyra at rare intervals. 

 The supposed top of the Eutaw group 45. 



13 — Gray, sandy calcareous clay, with lines of bowlder-like concretions project- 

 ing from the bank ; first seen at Lawson's wood-yard, Georgia. Few 

 fossils occur in the lower part of this stratum, except Exogyra costata^ 

 Say, a mile above Blufftown, Georgia, where characteristic Kipley shells, 

 mainly bivalves, are found in a much decomposed state throughout a 

 stratum 6 to 8 feet thick. The uppermost 10 feet of the stratum is very 

 fossiliferous. The river washes out little cave-like recesses in the banks. 

 Near Jernigan's landing, Alabama, slight rolls in the strata are seen, 

 involving about 20 feet of the sands, and these miniature anticlinals and 

 synclinals continue to within two miles of Florence, Georgia. The dip, 

 estimated from the line of bowlders, averages about 20 feet to the mile 

 and is normal in direction 120 



14 — Two miles above Florence, Georgia, and making part of a bluff 50 feet 

 high at that place, there is a gray sand interlaminated with thin seams 

 of a more argillaceous sand, all of which is unfossiliferous. Dip here 

 about 40 feet to the mile 26 



15 — Gray calcareous sands, containing a small, fragile Anomia and a line of 



hard, round concretionary bowlders 40 



16 — Gray and yellow sands, resembling in physical character those of the Ter- 

 tiary at Lower Peach Tree, Alabama 30 



17 — Gray, highly fossiliferous marl. The fossils are nearly, if not quite, all 

 bivalves, and are mostly comminuted as if they formed an ancient shore- 

 line. There are numerous shark teeth and a hard black substance 

 resembling in sections the under shell of a turtle, black coprolitic (?) 

 pebbles, and fragments of lignite 3 



18 — Sandy stratum, indurated and containing Ostrcea, sp 1 



19 — Cross-bedded gray sands and clay 15 



20 — Fossiliferous marl, about the same in general character as 17, onl}' little 

 or no lignite was seen, the marl appearing to be somewhat glauconitic. 

 (The strata from 17 to 21, inclusive, form a bluff on the eastern bank five 

 miles below Florence, Georgia.) 2 



21 — Gray, glauconitic, and calcareous sand, weathering into fucoidal masses 



and containing a few soft white phosphatic nodules- 10 



