ALLEGHENY FORMATION OF FIRST PENNSYLVANIA BASIN 81 



Feet. Inches 



1. Sandstone and conglomerate 27 u 



2. Black shale 1 3 



3. Sandstone 21 



4. Blue shale with plants 2 



5. Coal and shale E 5 7 



6. Fireclay 3 



7. Sandstone and conglomerate 76 



8. Coal bed, D 8 



Feet. Inches 



Coal 9 



Clay and shale 5 



Coal and shale 2 3 



9. Fireclay 1 



10. Sandstone and conglomerate 47 



11. Coal and shale, C 7 4 



12. Sandstone 19 



13. Black shale, plants 2 



14. Coal and shale, B 7 1 



15. Clay, sandstone and shale 13 



16. Coal and slate, A 9 10 



17. Sandstone 



The same beds are present on Pine creek where the intervals are variable, 

 that from A to B being 15 to 40 and that between D and E being 75 to 88 

 feet. The sandstone above E was taken by Mr Rogers, and afterward by 

 Mr Piatt, to be the Mahoning, thus identifying the bed E with the Upper 

 Freeport. Bed B is the only one economically important. Mr David 

 White's studies of the plant remains have made more than probable that 

 the correlation made by the older geologists is incorrect, for he finds that 

 the evidence would place bed B at the Mercer horizon of the Pottsville, 

 so that bed E is probably in the Kittanning group.* 



Two areas, no longer important, are in Clinton county, each showing 

 the beds lettered A, B, D by Mr Piatt. No information is given respect- 

 ing the interval rocks. The Snowshoe field of northern Center county 

 was studied by Mr Piatt, whose section, revised by Mr dTnvilliers, is as 

 follows : 



Feet. Inches 



1. Upper Freeport coal bed, E 5 



2. Fireclay, concealed, sandstone 53 9 



3. Lower Freeport coal bed, D 2 



4. Ore and coal 2 



5. Limestone [L. Freeport] 2 6 



* F. Piatt: Lycoming and Sullivan (G 2), pp. 93, 99, 125. 

 David White : Northern Appalachian coal field ; 22d Ann. Rept. U. S. Geol. Survey,, 

 p. 136. 



IX — Bull. Geol. Soc. Am., Vol. 17. 1905 



