219 



LiGNiTic Stage 27 



gathered by myself in 1872, 1880, 1881, 1882, and 1884 for the 

 Geological Survey of Alabama and for the Tenth Census of the 

 United States and information obtained by Mr. L. C. Johnson 

 in 1881, 1882, and 1883. The bulletin was not completed until 

 I had gone over the whole ground again, in the summer of 1885, 

 in company with Messrs. T. H. Aldrich and D. W. Langdon, of 

 the Geological Survey of Alabama. Finally, the results of my 

 investigations in the same region during the summer of 1886 

 have been in large part incorporated." 



During this field work, extensive colledlions of Eocene fos- 

 sils were made by members of the State Survey and Mr. T. 

 H. Aldrich ; and the latter prepared from this material an 

 illustrated monograph on the Eocene mollusca of the State 

 (Bull. I, Geol. Surv. Ala., 1886.) 



The stratigraphic work was published as Bull. 43 of the U. 

 S. Geological Survey, and, therein the following subdivisions 

 and names were included under the Eignitic : 



f Hatchetigbee i75 feet 



I Wood's bluff 80 to 85 feet 



I Bell's landing 140 feet 



Eignitic. ^ Nanafalia 200 feet 



I Matthews landing & Naheola 130 to 150 feet 



I Black bluff 100 feet 



t Midway 25 feet 



These works, it will be observed, bear mainly upon the Eocene 

 stratigraphy as shown along the Alabama and Tombigbee rivers. 

 But D. W. Eangdon, an assistant on the State Survey, continued 

 the work on eastward, and in 1890 read before the American 

 Geological Society a paper embodying many of his conclusions 

 on deposits farther east. 



In 1894 the State Survey published a report embodying among 

 other matter all the then known Eignitic stratigraphy. The Ala- 

 bama type secftion was revised to read : 

 Eignitic. Feet. 



a. Hatchetigbee - ^75 



b. Bashi or Wood's bluff Soto 85 



c. Tuscahoma or Bell's landing 140 



d. Nanafalia 200 



e. Naheola or Matthews' landing 130 to 150 



f . Sucarnochee or Black bluff 100 



Clayton (Midway) •••• 25 to 200 



