VALLEY DEFORMATION 



293 



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Figure 6. — Actual Crosfs-section of Potsdam Beds one Mile northwest of nrirk Chapel, 



New York 



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PRESENT STRUCTURE OF VALLEY. 

 Figure 7. — Cross-section of Potsdam Outlier on Harrison Creek. (Vertical X 3) 



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yALLE-Y BEFORE C O M Pf? ESS I ON. 

 ^Figure 8. — Ideal Cross-section of same Valley before Deformation begaii 



l/ALLEY AFTER COM PR ESSt ON 

 Figure 9. — Same Valley after Deformation; dotted Line shows Present erosional Profile 



