ALLEGHENY FORMATION OF WESTERN PENNSYLVANIA BASINS 95 



Clermont varies from 43 at the north to 78 feet in the southeast, an inter- 

 mediate measurement being 51 feet. A thin coal bed, without value, seen 

 occasionally between the Dagus and Clermont, is regarded by Mr Ash- 

 burner as probably the Scrubgrass coal bed of I. C. White, belonging 

 under the Vanport limestone.* 



The shallow synclines of northwest Cameron, west from Clinton and 

 Potter, south from McKean, carry patches of Allegheny showing the 

 three coal beds of McKean, which are separated by intervals of 29 feet 

 6 inches and 52 feet, the interval between Dagus and Clermont being 

 84 feet 6 inches, 6 feet greater than in the adjacent part of McKean. The 

 Vanport limestone is absent. This section would place the Clermont coal 

 bed at the Brookville horizon, f 



The complete Allegheny section is reached in southern Elk county, 

 west from Cameron and south from McKean. The Middle Kittanning 

 is the highest bed in Jones, the northern township, where the intervals are 

 greater than in McKean, and 40 feet of shale separate the Lower Kittan- 

 ning and the Vanport limestone. The latter, 9 feet thick and double 

 near the northern line, becomes a calcareous chert in the southern part 

 of this township as well as in Ridgway, but in the southeast part of the 

 county it is again a limestone. A thin coal bed, Ferriferous of Ash- 

 burner, but clearly the Scrubgrass, directly underlies the Vanport in the 

 northern townships, but is wanting at the southeast in Benzinger, where 

 the Clarion coal bed, 5 inches thick, is at 13 feet below the limestone and 

 16 feet above the Clermont (Brookville) coal bed. 



At the Dagus shaft, near the Clearfield border, Mr Ashburner recog- 

 nizes the Freeport coal beds, GO feet apart, with the Johnstown cement 

 limestone at somewhat more than 60 feet below the Lower bed. The 

 Upper Kittanning is not exposed above the shaft, but in the shaft the 

 Middle Kittanning is shown at 163 feet and the Lower Kittanning at 212 

 feet below the Upper Freeport. The Vanport limestone is 40 feet below 

 the Lower Kittanning, and another coal bed is reached at 25 feet lower, 

 which is correlated with the Clarion, but is more likely to be at the Brook- 

 ville horizon. The interval between the Lower Freeport coal bed and its 

 underlying limestone varies usually 2 to 5 feet, but in Horton township, 

 near the southern border of the county, it varies from 52 to 69 feet and 

 contains two coal beds, 2 and 3 feet thick ; the accuracy of Mr Ashburner's 

 identifications can not be doubted, for all four limestones are present in 

 his sections, the Vanport being richly f ossiferous and 35 feet above the 

 Clarion (Brookville) coal bed. The Upper Freeport is divided by a 



* C. A. Ashburner: McKean county (R), pp. 45, 99, 127, 133, 139, 171-172, 189. 

 f A. W. Sheaffer: Cameron (R R), pp. 46-50. 



