EASTERN COUNTIES OF ALLEGHENY PLATEAU 55 



Feet. Inches 



1 . Sandstone and shale 33 



2. Coal bed 3 



3. Sandstone and shale 17 



4. Kidney coal bed 2 to 6 



5. Sandstone and shale 10 



6. Coal bed .' £ 



7. Sandstone and shale. . . . 5 



8. Coal bed \ 



9. Sandstone and shale 88 



10. Coal bed 2 



11. Sandstone and shale 34 



Here are clearly the Homewood, the Mercer, the Connoquenessing, 

 and the Sharon of the western Pennsylvania section. Another area 

 exists in southwestern Tioga, which continues into Potter county, where 

 it is known as the Pine Creek basin, but no details are given respecting 

 it further than that the upper plate of the Pottsville is very coarse. In 

 Potter county is the small Coudersport basin which holds the middle 

 and lower members of the Pottsville with a coal bed at 15 feet above 

 the lower member, which is a massive sandstone between 60 and 70 feet 

 thick and shows a good deal of conglomerate. This lower member, 

 clearly the same with the bottom sandstone of the last section, has been 

 proved to be the Olean conglomerate of Ashburner, the Sharon of I. C. 

 White. The coal bed of this Coudersport basin is unimportant, though 

 it has been mined for local use.* 



Lycoming county is south from Tioga and west from Sullivan. Mr 

 Hodge's section, near Astonville, showed a thickness of 116 feet, distrib- 

 uted as follows : f 



Feet. Inches. Feet 



1. Coarse sandstone 30 



2. Coal bed 2 to 1 4 



3. Fireclay 5 



4. Coal bed 2 6 to 2 



5. Fireclay and shale 5 



6. Pebbly sandstone 25 



7. Coaly shale 2 



8. Conglomerate 45 



giving still the triple structure, the sandstones separated by shale and 

 coal. 



Clinton county is west from Lycoming and south from Potter. In 

 its western portion is a coal area within the same basin with the Bloss- 



* Franklin Piatt: Geology of Potter County (G3), 1880, pp. 73-78. 

 t James T. Hodge in Geology of Pennsylvania, 1858, vol. ii, p, 513. 



