ALLEGHENY FORMATION IN OHIO 109 



central and eastern Greene sandstones are as marked as those in the 

 West Virginia "panhandle." Two miles east from Waynesburg, in the 

 central part of the comity, 12 feet of sandstone is reported at 620 feet 

 below the Pittsburg, resting on 370 feet of black slate extending into the 

 Pottsville; at 5 miles east, the bottom of the Mahoning interval is 

 reached at 575, and at 607 this succession begins : 



Feet 



Dark sand 58 



White sand 390 



Dark sand 80 



in all, 528 feet of sandstone. Xo coal is reported. At 4 miles southeast 

 from the last the sandstone begins only at 691 and there is no coal above 

 it. Twelve miles southeast from Waynesburg, at Willow Tree, the only 

 coal bed present is about 830 feet below the Pittsburg, evidently at the 

 Brookville-Clarion horizon. Several miles southwest from Waynesburg 

 the Upper Freeport is at 555 feet below the Pittsburg, and in the suc- 

 ceeding 325 feet there are 250 feet of sandstone, and much of the shale is 

 sandy. No other coal is reported. 



Doctor White gives many records in western Greene county, but they 

 are not in detail; they suffice, however, to show that the Allegheny con- 

 tains no great sandstones in that area.* 



OHIO 



Doctor White's series of vertical sections connect Pennsylvania with 

 Ohio. The relations of the beds within the latter state were worked out 

 by Professor Orton, whose discussion of the Ohio Lower Coal Measures 

 must always remain preeminent not only for scientific accuracy, but also 

 for the delicacy with which are corrected the errors into which the inex- 

 perienced observers of the Second survey fell. 



Mahoning county adjoins Lawrence of Pennsylvania. Doctor White's 

 section at Lowellville, one mile west from the state line, is : 



Feet. Feet. Inches 



1. Kittanning [Lower] coal bed 2 4 



2. Concealed 40 



3. Ferriferous [Vanport] limestone .... 10 to 18 



4. Argillaceous shale 2 6 



5. Scrubgrass coal bed 6 



6. Sandy shales 12 6 



7. Clarion coal bed 1 4 



8. Flaggy sandstone 17 



9. Brookville coal bed 10 



10. Homewood sandstone 



* J. F. Carll: Seventh Kept, on Oil and Gas (I 5), pp. 310, 313, 341-347. 

 I. C. White: Geology of West Virginia, vol. \a, pp. 123, 131. 



