BULL. GEOL. SOC. AM. 



VOL. 27, 1915, PL. 11 



Canada Localities. 



o 



2 



o 

 •a 

 in 



e 



c 

 to 3 



696 



738 



290 



290 



406 



448 



24 



2 



430 



450 



25 



6 



266 



288 



696 



738 



Present altitude of Iroquois 



Extinction altitude of Iroquois 



Post-Iroquois uplift. . \ 



Present marine plane / 



■Glacial uplift, before Iroquois extinction 



Total uplift, by isobases 



Rise of Iroquois level due to flooding . . 



Initial altitude 



Present altitude of Iroquois 



362 



I 

 290 



II 

 72 



+ 

 98 



170 



+ 



32 



+ 



110 



II 

 362 



434 



290 



144 



106 



250 



74 



no 



434 



557 



290 



267 



83 

 350 



5. • 



207 

 557 



632 



290 



342 



53 

 395 



55 

 237 

 632 



676 



682 



290 



290 



386 



392 



39 



33 



425 



425 



36 



9 



251 



257 



676 



682 



New Yokk Localities 



22 



gO 



rt 



n 















c 



a 



S 



< 



| 



edS 



« 



565 



603 



650 



671 



? 



290 



290 



290 



290 



? 



275 



313 



360 



381 



? 



115 



102 



85 



69 



•? 



390 



415 



445 



450 



? 



38 



42 



51 



62 



35 



172 



188 



205 



221 



? 



565 



603 



650 



671 



? 



Present altitude of Iroquois 



Extinction altitude of Iroquois 



Post-Iroquois uplift. . \ 



Present marine plane ) 



Glacial uplift, before Iroquois extinction 



Total uplift, by isobases . 



Rise of Iroquois level due to flooding. . . 



Initial altitude 



Present altitude of Iroquois 



362 



385 



290 



290 



II 





72 



95 



+ 





98 



95 



II 





170 



190 



+ 





82 



85 



+ 





110 



110 



II 





362 



385 



430 



290 



140 



105 

 245 

 75 

 110 

 430 



440 



440 



456 



290 



290 



290 



150 



150 



166 



no 



110 



114 



250 



260 



280 



80 



70 



66 



110 



110 



no 



440 



440 



456 



452 



2S0 



162 



143 

 305 

 37 

 110 

 452 



460 



290 



170 



180 

 350 



Splitting) - 

 of (-0 

 beaches. ) 



110 

 460 



544 

 290 



254 



121 

 375 

 22 

 169 

 544 



860 



900 



290 



290 



570 



610 



25 



10 



595 



620 



9 



9 



265 



280 



860 



900 



980 

 290 



690 



5 

 695 



? 



285 

 980 



1,015 

 29Q 



725 





 725 







290 



1,015 



1,030 

 290 



740 





 740 







290 



1,030 



PLEISTOCENE DEFORMATION OF THE ONTARIO BASIN 



Altitude figures refer to ocean level. The figures in heavy face are field measurements 



