OF CENTRAL CANADA PART V. 355 



APPENDIX. 



Sequence of Rock Formations recognized within the Provinces of 

 Ontario and Quebec. 



Fifr*&- 



POST-CAINOZOIC FORMATIONS : 



24. Deposits of Recent Origin. 



23. Post-Glacial Deposits. 



22. Drift or Glacial Deposits. 

 PALEOZOIC FORMATIONS : 

 Carboniferous : 



21. Bonaventure Fn. 

 Devonian : /^ 



20. Portage-Chemung Fn. 



19. Hamilton (or Lambton) Fn. 



18. Corniferous Fn. 



17. Oriskany Fn. 

 Upper Silurian : 



1 6. Lower Helderberg or Etirypterus Fn. 



15. Onondaga or Gypsiferous Fn. 



14. Guelph Fn. 



13. Niagara Fn. 



12. Clinton Fn. 



11. Medina Fn. 



Lower (or Cambrio-) Silurian : 

 10. Hudson River Fn. 



9. UticaFn. 



8. Trenton (and Black River) Fn. 



7. Chazy Fn. 

 Cambrian : 



6. Calciferous (including Quebec) Fn. 



5. Potsdam Fn. 



4. Keweenian Fn. 



3. Animikie Fn. 

 ARCHAEAN FORMATIONS : 



2. Huronian Fn. 



1. Laurentian Fn. 



