WESTERN COUNTIES OF PENNSYLVANIA 73 



in which the bottom sandstone is mostly Logan, as appears from the 

 succession somewhat farther south toward Allegheny, which shows 



Feet 



Homewood sandstone 60 



Not named 20 



Coal bed, Tionesta [?] 2 



Shale. 63 



Sandstone 35 



Sandy shale 45 



Sandstone 52 



Shale 15 



Sandstone 48 . 



resting on the Tuscumbia (Silicious) limestone, which has made its ap- 

 pearance in the interval. The Mercer group is not less than 63 feet, the 

 Connoquenessing is 132 feet, and the Sharon sandstone appears to be 

 again in the section.* 



A very notable change takes place at a little way south on the Mo- 

 nongahela, where one finds 



Feet 



Homewood sandstone ,....• 45 



Shales, sandstones, and a coal bed 73 



Sandstone 42 



Sandy shales and a coal bed 33 



Sandstone and shale 7 



Sandy shale with coal 7 



resting on the Lower Carboniferous limestone. The Homewood, Mercer, 

 and Upper Connoquenessing are distinct, but both Lower Connoquenes- 

 sing and Sharon are absent, for the lower part of the section has the 

 characteristics of the Quakertown. The Ferriferous limestone of the 

 Allegheny formation is 55 feet above the Homewood. f 



Eastward from the Allegheny and Monongahela rivers one finds im- 

 portant records in Westmoreland and Fayette. In the extreme north- 

 west corner of Westmoreland, not far from 'the last locality in south- 

 eastern Butler, the record is 



Feet 



Homewood, white sandstone 100 



Shales 35 



Sandstones — gray, red, white 120 



Shales 50 



Coal bed 7 



Shales 40 



Sandstone 178 



*J. F. Carl! : Seventh report on the oil and gas fields of Western Pennsylvania (15), 1890, pp. 

 152, 234, 239, 252, 253, 254, 255. 

 tJ. F. Carll : 1886 report, p. 652. 



