286 THE IRON ORE DISTRICT OF EAST TEXAS. 



The depth of the calcareous greensand shell marl is approximately shown 

 by the following section, sectionalized from the boring or drilling of well 

 No. 1, Day farm, now the property of the Lubricating Oil Company, about 

 eighteen miles southeast of Nacogdoches. The section is figured on " Henry 

 W. Sawyer and D. C. Mast's map of oil lands in Nacogdoches." 



1. Derrick flooring timbers 2 feet 1 inches. 



2. Red clayey earth 9 feet. 



3. Bluish green calcareous shell marl 61 feet. 



4. Dark green calcareous shell marl 49 feet. 



5. Dark drab clay 20 feet. 



6. Light drab clay, with iron pyrites 16 feet 6 inches. 



7. Sand and iron pyrites, with "slush oil" , . . 2 feet 6 inches. 



8. Dark drab clay 35 feet. 



9. Calcareous marl with sand streakings 6 feet. 



1 0. Sandstone 3 feet. 



1 1 . Clay with sand streakings and iron pyrites .... 7 feet. 



1 2. Dark bluish green shell marl 29 feet. 



13. Dark drab clay 11 feet. 



14. Marl 3 feet. 



Total depth of well 254 feet 10 inches. 



The geographical altitude of the lignitic series, as appears from the dump 

 of a recent well dug for water on a ridge between this locality and Cherino, is 

 above No. 1, and to the bottom of the oil well section, which is far below the 

 usual horizon of the lignitic series, there is no indication of lignite. The in- 

 ference is either that the Eocene lignite does not exist below the bottom of 

 the oil well, or that there has been an abrupt dip of the strata, which is not 

 sustained by other observations. There are other facts, such as the diotama- 

 ceous earth, etc., in Angelina and adjoining counties, which harmonize with 

 the Miocene hypothesis, but the other details are reserved for future descrip- 

 tion, as they require further investigation. 



