1.18 J. J. STEVENSON CARBONIFEROUS OF APPALACHIAN BASIN 



in one the coal bed is 30 feet above the lower limestone. The place of 

 this limestone, evidently the same with Eead's black limestone of 

 Holmes, is very uncertain, for it sometimes approaches very closely to 

 the Middle Kittanning. It is not far from the place of the Lower Kit- 

 tanning, which at one time was mined near Coshocton, where it is 30 

 feet below the Middle Kittanning and 44 feet above the Putnam Hill, 

 and there the Marble is represented by a calcareous sandstone. The 

 great variability of intervals in Coshocton county adds to the difficulty 

 of correlating this limestone. As it overlies the coal, one may be justi- 

 fied in regarding it as representing the Vanport and the underlying coal 

 as a Clarion bed; so that where it approaches closely to the Middle Kit- 

 tanning the interval to and including the Lower Kittanning has disap- 

 peared as it does in Holmes county. 



The Middle Kittanning, according to Professor Orton, Jr., is from 32 

 to 79 feet above the Putnam Hill limestone; there is no place for error 

 in the small interval, for the section is distinct down to the Lower Mercer 

 coal bed. . The greatest interval was found near the Holmes line and the 

 least at 8 or 10 miles south. Professor Hodge's sections show even 

 greater variation in this interval. In the northeast corner it is 90 to 100 

 feet ; 6 miles west it is 100 ; barely 6 miles farther west it is 40 to 50 feet ; 

 in the south central part of the county it is 46 to 65, but in the southern 

 tier of townships along the Muskingum border it is 80 to 90 feet. There 

 is no possibility of error in the identification, as the "Black marble," 

 Putnam Hill, and Zoar (Lower Mercer) limestones are present in most 

 of the sections and the Middle Kittanning shows the usual features 

 throughout. The last is the important coal of the county. 



Very little information is available for the higher beds. No trace of 

 the Upper Kittanning appears. 



Professor Hodge reports a 1 foot 6 inches bed at 90 feet above the 

 Middle Kittanning, near the Holmes line, and in an adjoining township 

 is a limestone at 65 feet above the Middle Kittanning. This may be the 

 very fossiliferous buff limestone seen in Bedford township at 130 feet 

 above the Putnam Hill limestone. A coal bed is in two townships at 60 

 to 70 feet above the Middle Kittanning and near Coshocton it is 87 feet. 

 This bed, 60 to 90 feet above the Middle Kittanning, may be the Lower 

 Freeport. The Upper Freeport, wholly unimportant, is reached in the 

 northeastern part of the county, where Mr Hodge found it 115 feet above 

 the Middle Kittanning and underlying ore and limestone as in Tus- 

 carawas and Stark.* 



* J. T. Hodge : Vol. iii, pp. 570-571, 573, 578-579, 580, 582, 586-587, 589, 591. 

 E. Orton : Vol. v, p. 93. 

 E. Orton, Jr. : Vol. v, pp. 855-857. 



