JEFFERSON COUNTY. 753 



carrying ofE the raost perfectly macerated vegetable matter from our 

 modern swamps. In the general discussion of the formation of coal con- 

 tained in Chapter XXXI, p. 125, the origin of cannel is so fully treated 

 that no further reference to it is required here. 



From Brown's Station to the mouth of Wills Creek there are no ex- 

 posures which can serve to maintain the geological connection, and no 

 explorations have been made by boring or otherwise that can help us in 

 the correlation of the Steubenville coals, and those of Island Creek, and 

 the upper river. This blank is greatly to be regretted, as, until it shall 

 be filled, it will be perhaps impossible to definitely settle the mooted 

 question of the proper numbering of the Steubenville " Shaft Coal." 



WILLS CREEK. 



The valley of Wills Creek lies altogether in the Lower Barren Meas- 

 ures. At its mouth the base of this series is reached, and the tributaries 

 of the stream have their sources in hills which rise above the Pittsburgh 

 Coal. 



The following section gives the succession of the strata from the house 

 of Deacon Robertson — situated on the hills which overlook the valley 

 of Wills Creek on the north side — to the mouth of the creek. Prom this 

 level it is continued downward from the register of the well bored by Mr. 

 J. McElroy, half a mile from the Cleveland & Pittsburgh Railroad, and 

 (Commencing about twenty-five feet above it. 



Section on Vailey op Wills Greek. 



FT. DT. 



1. Slope concealed 38 



2. Limestone 3 



3. Coal , 1 



4. Slope concealed 28 



5. Limestone — reported 5 



6. Shale 1 



7. Coal No. 8, Pittsburgh seam 4 



8. Fire-clay - 1 



9. Limestone 2 



10. Slope concealed - 140 



11. Limestone reported 8 



12. Sandstone 30 



13. Shaly sandstone 42 



14. Blue shale (limestone on opposite side of yalley ) 5 



15. Co.al, good— Harlem seam (?) )l 



16. Fire-clay (reported) - 9 



17. Concealed - 80 



18. Limestone (reported) 4 



19. Concealed 75 



48 



