SECOND ANNUAL REPORT—STRATIGRAPHIC GEOLOGY. 
79 
Sections at Old Chattahoochee Landing. 
Feet. 
1. Reddish sand and gravel, with streaks of clay. 20 to 40 
2. Grayish yellow friable marl, with harder layers.. 20 
3. Greenish clayey marl, very adhesive... 2*4 
4. Chattahoochee limestone, with fossil casts.. 4 
5. Talus to water’s edge, about. 3 
Total thickness .49*4 to 69*4 
This section was taken on the road running northeast from the landing. 
Feet. - 
1. Reddish sands, gravel and clays.. 15 to 20 
2. Grayish yellow marl, friable .. 20 
3. Greenish clayey marl, sticky . 2*4 
4. Talus to Water’s edge, about . 3 
Total thickness .30J4 to 4514- 
Section number 2 was taken on the road which runs about southeast from 
the landing. The exposures are mostly in the gullies. 
The fossil-bearing bed is number 4, and contains, among other fossils, 
echinoids, Pecten (Chipola sp.), Area (like transversa), large solitary coral, 
Venus penita, Lima (like scabra), Hemicardium, Ostrea, Loripes, Scala, Plicat- 
ula, Divaricella, Pyrazisinus, Phorus, all as poor casts; fish bones and ribs of 
some mammal resembling those of the Manatee. No orbitolites were seen. 
From the correlations made by Dali it is apparent that he regarded 
No. 1 of the above section as Lafayette and Nos. 2 and 3 as Alum 
Bluff. A generalized section made by Vaughan 1 from Chattahoochee 
Landing to Chattahoochee postoffice, is given below: 
Thickness. 
Feet. Inches. 
3. Red sands with some gravel. Toward the base becoming more 
argillaceous sometimes composed of mottled red sands 
and bluish or purplish clays. The basal portion forms a 
mantle following quite closely the contact with the Alum 
Bluff formation .. 50 
The mottled basal portion extends through a vertical 
distance of about 40 feet. 
2. White chalk and clays sometimes greenish or bluish. The 
greater portion of these clays are calcareous and a con¬ 
siderable portion is argillaceous limestone in harder and 
softer ledges. A calcareous specimen (chalky) was taken 
70 feet above the water’s edge of the river. The clays are 
jointed and show conchoidal exfoliation. The lower por¬ 
tion of this exposure does not appear to be calcareous. 
Some fine sands at the bottom. Thickness... 50 
Rocks of the same character, either clay or limestone, as 
that described above, occur 100 feet above the river. The 
Vaughan, T. Wayland. Unpublished notes. 
