ALLEGHENY FORMATION OF SECOND PENNSYLVANIA BASIN 93 



for when thick it contains much refuse. Stevenson reports it as 5 feet 

 11 inches at one locality in Fayette, but Campbell has proved the identifi- 

 cation erroneous and the bed is probably higher in the formation. The 

 Middle and Upper Kittanning rarely attain even local importance; 

 usually thin, they sometimes thicken up to a worthless mass of coal and 

 shale. The Lower Freeport is always insignificant. The Upper Freeport 

 becomes very thick on the west side, but is broken by partings. At one 

 locality near the West Virginia line it is 9 feet 7 inches thick, with 16 

 layers of coal, shale, and clay. On the easterly side it is commonly double, 

 2 to 6 feet thick, but the coal is tender, sulphurous, and high in ash. 



The Upper Freeport limestone appears in most of the sections, but the 

 Lower Freeport appears rarely south from Westmoreland, and the Johns- 

 town seems to be absent from Fayette. The Freeport and Kittanning 

 sandstones are distinct, rarely other than massive in these counties.* 



The intervals between the several coal beds show as great variation as in 

 the First basin, but that between the Upper Freeport and the Lower Kit- 

 tanning shows narrow variations within considerable areas; these may be 

 summarized thus: 



Feet. Feet 



Center (d'Invilliers) 163 to 176 



Clearfield (James) 168 



Clearfield (I. C. White) 169 



Northwest Cambria (d'Invilliers) 163 to 168 



Western Cambria 183 



Indiana (W. G. Piatt) 207 



Northern Westmoreland (Stevenson) 251 



Central Westmoreland (Stevenson) 189 



Southern Fayette ( Stevenson ) 197 



North from Fayette county the presence of the three limestones in almost 

 all of the sections renders the identifications certain. These limestones 

 are non-fossiliferous and show as notable variation in composition and in 

 appearance as they do in the First basin. 



Passing over into Preston county of West Virginia, one finds at 12 

 or 13 miles from the Pennsylvania line the following measurements of 

 cores obtained by diamond drill: 



Feet. Inches 



1. Upper Freeport coal bed and partings 10 2 



2. Fireclay, limestone, sandstone 21 1 



3. Green shale and sandstone 14 2 



4. Gray sandstone, Upper Freeport [Butler] 29 8 



5. Lower Freeport coal bed 1 1 



* J. J. Stevenson ^ loonier valley (K 3), pp. 89, 135, 158, 172. 

 M. R. Campbell : U. S. Geol. Survey folio, Masontown-Uniontown, 1903. 



