CONEMAUGH FORMATION IN OHIO 195 



place of the Jeffers coal of Gallia county— probably a Little Pittsburg. 

 He gives a record from Lawrence near Cowrun on the authority of the 

 late F. W. Minshall, for whom the well was drilled. The section, begin- 

 ning at 140 feet below the Pittsburg coal bed, is : 



Feet. Inches 



1. Alluvium 22 



2. Red and blue shale 74 



3. Fossiliferous limestone [Ames] 1 6 



4. Yellow shale 18 



5. Coal [Harlem] Thin 



G. Interval 20 



7. Sandstone 30 



8. Clay 4 



9. Interval, coal [Brookville] near bottom 377 



10. Sandstone 130 



Here one has the "Big Bed" over the Ames, and the Harlem coal is at 

 256 feet below the Pittsburg. The interval to the Ames is as large as 

 that to the Cambridge along the western outcrop, which misled Andrews 

 into identifying this limestone with the Cambridge. The bottom of the 

 sandstone, Xumber 7, regarded by him as the Cowrun, is 305 feet below 

 the Pittsburg coal. In the record of the Centennial well published by 

 Professor Bownocker the top of the Cowrun sandstone is 314 feet below 

 the Pittsburg, and that bed is 47 feet thick, resting on 23 feet of red 

 shale. The bottom of the "Big Bed ,? is at 223 feet. A sandstone 10 feet 

 thick at 479 feet is at the place of the Mahoning. There is no thickening 

 of the measures here as compared with more northerly localities, for the 

 Brookville coal bed, at 705 feet in the Monroe well, is here at 701, and in 

 the Minshall well at about 686 feet. The bottom of the sandstone below 

 this coal is 814 in the Minshall well, 828 in the Centennial, and 800 feet 

 in one of the Monroe wells. 



Going southward into Newport township, one finds on the Ohio river 

 Professor Andrews' section of the Ames and associated rocks, which is 

 almost exactly the same as in the Minshall boring. In a well near by, 

 drilled for Mr Minshall, the Harlem coal bed rests directly on 44 feet 

 of pebbly sandstone, below which for 210 feet are blue and red shales 

 resting on 100 feet of sandstone, beginning at 508 feet below the Pitts- 

 burg, and at 709 feet is the Brookville coal, with black shale resting on 

 120 of sandstone to 828 at the bottom of the well. The 100 feet of sand- 

 stone must be taken as belonging within the Allegheny. At 6 or 7 miles 

 northwest from this locality and at the same distance west from the 

 Cowrun wells is the record of a well at Marietta published by Professor 

 Orton. There the Pittsburg and the "Big Lime" are wanting and the 



