Geological Survey of Alabama. 9 



3. Indurated sandy ledge 1ft. Gin. 



4. Calcareous clay, sandy at bottom 5 ft. 



5. Light yellowish-gray calcareous sand, lower part indurated, con- 

 taining casts of shells 5 ft. 



6. Light yellowish -gray calcareous sands, containing 0. sellceformis, 

 Con.; Seutella Lyelli, in fragments; Scalpellum Eocense, Meyer; Pecten 

 Deshayesii, Lea; Pecten seintillatus (?), Con., etc. Shows indurated 

 ledges in places 27ft. 



7. Layer of comminuted oyster shells 3ft. 



8. Dark blue sandy clay 2 ft. 



9. Bluish green clayey sands, very few fossils in upper part, crowded 

 below, a large number of fossils distorted by pressure. 0. sellceformis, 

 Con.; Venerieardia rotunda, Lea; Nucula magnified, Lea; Area rhom- 

 boidella, Lea; Anomia n. sp. Amphidesma Hnosa, Con., and many other 

 bivalves 10 to 15 ft. 



10. Dark bluish-green sand, containing a peculiar small form of Vener. 

 planieosta, Lam.; Turritella Mortoni, Con.; TurriteUa n. sp., CrassateUa, 

 sp., Corbula. sp., many bivalves.. 6ft. 



The Section at Lisbon is as follows, and Nos. 1 and 2 are equivalent to 

 Nos. 9 and 10 of the preceding. 



Section at Lisbon. 



1. Brown, sandy strata, badly weathered, few fossils 10 ft. 



2. Sandy clays, dark brown, badly weathered also, but highly fossil- 

 iferous; contain the same fossils as Beds Nos. 9 and 10, at Claiborne, 

 such as the following : Amphidesma linosa, Area rhomboidella, Turritella 

 n. sp., V. planieosta, the peculiar, small variety; V. rotunda, Lueina 

 compressa, Ancillopsis vetustus, Rostellaria Whitfieldi, Heilpr, etc., 12 ft. 



3. Hard, sandy ledge 8 in. 



4. Calcareous, clayey sands, light yellow when wet, nearly white when 

 dry 6to8ft. 



5. Coarse-grained, ferruginous sands, fossils numerous 3 ft. 



6 and 7. Light yellow sand, with hard ledge on top ; lower five feet 



dark blue when wet 20ft. 



8. Bluish-black clays ; first of the Buhrstone 8 ft. 



3. The Buhrstone. Minimum thickness 300 feet, the materials almost 

 altogether aluminous and silicious, consisting of aluminous sandstones, 

 claystones and quartzose sandstones, with occasional thin beds of glauco- 

 nitie sands. 



