ALLEGHENY FORMATION IN OHIO 111 



The Freeport limestones are present, as are also the Bntler and Freeport 

 sandstones. The interval from the Lower Kittanning to the Scmbgrass 

 is almost the same as at Leetonia, while that from the Upper Freeport to 

 the Lower Kittanning is 162 feet, practically the same as in southern 

 Mahoning, where it is 150 feet from the Upper Freeport limestone. The 

 Lower Freeport becomes locally important as the Whan coal bed within 

 a small area in central Columbiana, but for the most part it is worthless. 



The Upper Freeport coal bed is wanting in most of Doctor White's 

 sections in eastern Columbiana, but its limestone is present at 40 to 45 

 feet above the Lower Freeport. The Middle Kittanning (Darlington) is 

 present to nearly midway in the county, but the Vanport limestone is of 

 uncertain occurrence, at times represented only by fossiliferous shale. In 

 the southern part of the county, Doctor Newberry reports the Lower 

 Kittanning as 115 to 125 feet below the Lower Freeport, and at Liverpool 

 176 feet below the L T pper Freeport.* 



Farther south, on the north border of Jefferson county, the section to 

 the Lower Kittanning is shown at several places. Professor Orton gives 

 two measurements on Yellow creek, three miles apart : 



Feet. Inches. Feet. Inches 



Brush Creek coal bed 4 6 4 



Interval with Mahoning limestone 60 67 



Upper Freeport, "Big vein" Blossom 4 



Interval with Upper Freeport lime- 

 stone 72 61 



Lower Freeport, "Roger vein" Blossom 3 



Interval with Lower Freeport lime- 

 stone 65 65 



Middle Kittanning, "Darlington".. Blossom 2 4 



Interval with thin coal 23 6 22 



Lower Kittanning, "Creek clay," 



or "Potters' vein" Blossom 2 



The Ames limestone is 220 feet above the Upper Freeport near the second 

 measurement. Professor Orton says that the Pittsburg is about 530 feet 

 above the Lower Freeport and the Ames is 260 above the Upper Freeport 

 near the first measurement, a loss of almost 50 feet in 14 miles from 

 Smiths ferry. Southward from Yellow creek the Upper Freeport be- 

 comes uncertain and the Lower Freeport, hitherto irregular, becomes very 

 important. The Lower Kittanning, exposed along the river for more 

 than 10 miles below Yellow creek, is accompanied by its important clay 

 bed. The interval between the Lower Freeport and Lower Kittanning is 



* I. C. White: (Q Q), pp. 266, 272, 274. 

 J. S. Newberry : Vol. iii, pp. 108, 113-115. 

 E. Orton : Vol. v, pp. 37-38. 



