CYCLES OF EROSION IN PENNSYLVANIA 545. 
Piedmont province. In order to secure continuity between 
adjacent and discordant levels, it was necessary to assume abrupt 
and steep warping of the peneplain in some localities, and when 
accordance was secured it left unexplained the remarkable preserva- 
tion throughout the Piedmont province of so ancient an erosion 
surface, and failed to explain why no records were preserved of the 
later continental movements and erosion cycles which are recorded 
in the sedimentary succession. 
Fic. 2.—Kittatinny, Schooley, and Honeybrook peneplains in the Reading 
quadrangle. The summit of the ridge on the left at 1,140 feet represents the Kit- 
tatinny; the ridge in the middle at 1,000 feet, the Schooley; the ridge on the right 
at 700 feet, the Honeybrook peneplain. West Reading in middle distance, looking 
east. 
The Kittatinny peneplain has been traced northeastward from 
the type locality to the base of the Catskill Mountains in New 
York, and westward and southward into Maryland and West 
Virginia. In the Blue Ridge province, surfaces which are probably 
remnants of the Kittatinny have altitudes of 1,800 feet in southern 
Pennsylvania (South Mountain), 1,300 on Blue Mountain to the 
northeast, and 1,200 feet in the quartzite ridge east of Reading 
(Penn Mountain, the dominating highland of the area, designated 
the Reading Prong of the New England upland). (See Figs. 2 
and 3.) 
Whether the Kittatinny peneplain is anywhere preserved in the 
Piedmont province of Pennsylvania is questionable. Reduced 
remnants of it may appear on Welsh Mountain (Honeybrook 
