296 CAMPBELL — NORTH PENNSYLVANIA AND SOUTH NEW YORK 



3. The recognition in eastern Pennsylvania of the Harrisburg pene- 

 plain of probably early Tertiary date of origin lying between the 

 Schooley and Somerville peneplains as described by Davis. 



4. The gradual northwestward ascent of this peneplain to an altitude 

 of 1,200 to 1,300 feet along the Alleoheny front. 



5. The provisional correlation of this peneplain with a peneplain ex- 

 tensively developed in the southwestern part of Pennsylvania and in 

 Ohio at an altitude of from 1,200 to 1,250 feet. 



6. The determination of the north and northeastern rise of this surface. 



7. The correlation of the Harrisburg peneplain as determined in the 

 eastern and western parts of the state with the Chemung hilltops of Tioga 

 and Potter counties, thereby corroborating the provisional determination 

 of the early Tertiary age of the latter feature. 



8. The determination of the ellipsoidal or dome-shaped deformation 

 of the peneplain about a general center located in Potter or McKean 

 county, where its surface reaches an altitude of about 2,200 feet above 

 sealevel. 



