552 F. BASCOM 
removed at the “‘fall-line.” It passes under the Raritan (Upper 
Cretaceous) formation near the junction of the Coastal Plain and 
Piedmont. 
Fic. 13.—Harrisburg peneplain in the Coatesville quadrangle. The dissected 
peneplain at an altitude of 600 feet, as seen one-third of a mile northwest of Humphrey- 
ville, looking southwest. 
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i 
Fic. 14.—Harrisburg peneplain on Schuylkill River, in the Reading and Honey- 
brook quadrangles. The summit of the hill in the middle distance in which the river 
is cutting a steep bluff represents the Harrisburg peneplain, altitude 600-660 feet. 
Gibraltar Hill, 900 feet, a monadnock, on the left, and the Sunderland plain in the 
foreground, as seen from Lookout Point, Neversink Mountain, looking south. 
The Harrisburg peneplain‘’ has been restricted, with the approval 
of its sponsor, at its type locality northeast of Harrisburg to upland 
1M. R. Campbell, Bulletin Geol. Soc. America, Vol. XIV (1903), pp. 277-96. 
