180 RESOURCES OF TENNESSEE. 



Thickness From To 



Dark shale 6 556 562 



Dark gray sandstone 6 562 568 



Dark shale 6 568 574 



Sandstone, with some dark shale (base of Lee) 40 574 614 



Gray limestone (top of Pennington) 14 614 628 



Red and green shale, with thin limestone at 717 107 628 735 



Dark slate-colored shale 14 735 749 



Red and green shale 56 749 805 



Light gray limestone 10 805 815 



Dark shale with occasional thin limestone 45 815 860 



Brown saccharoidal dolomite, fine-grained, oil-bearing 5 860 865 



Dark limestone, and some brown dolomite 5 865 870 



Dark limestone 5 870 875 



Oolitic limestone 5 875 880 



Dark gray limestone 65 880 945 



Fine brown dolomitic limestone, saturated with oil, 



had some gas 5 945 950 



Fine dark-gray limestone 5 950 955 



Brownish-gray crystalline limestone with top of oil 



"sand" reached at 960 10 955 965 



Correlations. While the general geology will be discussed on a later 

 page, it may be well to point out here certain correlations in the above 

 records. 



In each well a number of the samples above the first red shale, or first 

 plainly evident limestone, were tested chemically for limestone so that the 

 boundary between the Lee and the Pennington is fixed with certainty. In 

 the Toomey No. 2 and the West No. 1 wells the top of the Pennington is 

 limestone, but in the Hendren No. 1 well it is red and green shale. 



Beneath about 200 feet of Pennington shale there appears in each of 

 the three wells a very light gray or almost white limestone that must be 

 at the same horizon. Between 50 and 60 feet lower in the Toomey No. 2, 

 at a depth of 860-865, and in the West No. 1 at 848-853 depth there ap- 

 pears a very fine-grained saccharoidal brown magnesian limestone (see 

 analysis No. 2), that is undoubtedly the same in each well. This bed is 

 very inconspicuous in the Hendren No. 1 well, but it is believed that it is 

 represented by some fine gray material, not oil-bearing, at 810 to 815. 



In each well an oolitic limestone appears ten or fifteen feet below this 

 fine magnesian limestone. In the Hendren No. 1 well it is found at 826 

 to 832, in the Toomey No. 2 at 875 to 880, and in the West No. 1 at 873 

 to 878. The position of these different beds is indicated in the columnar 

 sections in Fig. 3, and their importance will become obvious in the discus- 

 sion of the structure on a later page. 



