'. .■■■■■:l"^""i- '-r 



CHAaiAUQUA 



CATTARAUGUS 



ALLEGA^TY 



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ir^-ERiE '-T-7r:.-n ^- -^1- 



WARREN 



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UeKEAN 



High 



10 10 



SPOTTER ' 2 



TRUMBULL 



MAHONING 



\, - -^- I Plateaus ~\ "oi 



*■ -J ><-* > FORESf i ' "^ V _ 



'^ R/,/.;.- JEFFERSON' ,• ' /' 



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MERCER 





CLINTON 



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BUTLER 



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' BEAVER 



, J COLUMBIANA ha"^'"^ ' ' ARMSTRONG 



ALLEGHENY ] ^^^ ,>' / "* i 



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WASHINGTON 



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^ (to / 



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crf<^ I GREENE I ^^.-,. CJ" f\ ^ ^ / ^ / i 



TYLER ^^^^ V, :^^^ ^y//^>^ # K/ -^ 



,-1 ^ / MARION 



^ ' TYLER _> ^ C_ 



-- ^ / ^ I' TAYLOR I 



^. j' HARRISON t ^ -S;^ _ .^..^ _ 



« >~^/ LEWIS ^ ^. /^.v r^^> ',/ 





HARDY 



■'">^ — V <CLARKEy -^ 



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A- 



County Map of Western Pennsylvania and Adjacent Areas. Mountain 

 Uplands, mostly 2,000-3,000 ft. altitude, swing across the southeastern quarter, with the 

 Ridge and Valley area to the southeast. The High Plateaus, mostly 1,800-2,400 ft. alti- 

 tude, occupy the northeastern area; plateaus cut by narrow deep valleys. The Glaciated 

 area in the northwest is bordered southwards by much dissected hilly country. A narrow 

 belt of sandy Lake Plain borders Lake Erie. 



