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The Stratigraphic Map series from the TGI II project provides seamless 1:1 000 000 maps of the project area, including 45 structure maps and 53 isopach maps, mapping a total of 56 different horizons from the Mesozoic and Paleozoic. The maps were drawn from a database containing a comprehensive list of formation tops from a total of 9012 wells, which includes 2606 wells from Manitoba, 5046 wells from Saskatchewan, 771 wells from North Dakota, and 589 wells from Montana. Computer-generated structure and isopach maps for 56 geological horizons, spanning Manitoba, Saskatchewan, North Dakota and Montana were created. North Dakota and Montana data are hidden on the final suite of maps, but were used during map generation to maintain geological accuracy of the contours at the international border.

Maps for free download:

• Paleozoic Erosional Surface (structure only)
• Mississippian Erosional Surface (structure only)
• Mississippian Big Snowy Group (structure and isopach)
• Mississippian Charles Formation, Poplar Beds (structure and isopach)
• Mississippian Charles Formation, Ratcliff Beds (structure and isopach)
• Mississippian Charles Formation, Midale Beds, Midale Evaporite  (isopach only)
• Mississippian Charles Formation, Midale Beds (structure and isopach)
• Mississippian Frobisher Beds, Frobisher Evaporite (isopach only)
• Mississippian Mission Canyon Formation, Frobisher Beds (structure and isopach)
• Mississippian Mission Canyon Formation, Kisbey Sandstone (structure and isopach)
• Mississippian Mission Canyon Formation, Alida Beds (structure and isopach)
• Mississippian Mission Canyon Formation, Tilston Beds (structure and isopach)
• Mississippian Lodgepole Formation (Souris Valley Beds) (structure and isopach)
• Mississippian Bakken Formation (structure and isopach)
• Devonian Torquay Formation (Three Forks) (structure and isopach)
• Devonian Birdbear Formation (structure and isopach)
• Devonian Duperow Formation (structure and isopach)
• Devonian Duperow Formation, Flat Lake Salt (isopach only)
• Devonian Souris River Formation (structure and isopach)
• Devonian Souris River Formation, Davidson Salt (isopach only)
• Devonian Souris River Formation, Upper Harris Salt (isopach only)
• Devonian Souris River Formation, Lower Harris Salt (isopach only)
• Devonian Dawson Bay Formation (structure and isopach)
• Devonian Dawson Bay Formation, Hubbard Salt (isopach only)
• Devonian Prairie Evaporite Formation (structure and isopach)
• Devonian Winnipegosis Formation (structure and isopach)
• Devonian Ashern Formation (structure and isopach)
• Silurian Interlake Group (Formation) (structure and isopach)
• Silurian Stonewall Formation (structure and isopach)
• Silurian Stonewall Formation (Upper Stonewall Anhydrite) (isopach only)
• Ordovician Stonewall Formation (Basal Stonewall Anhydrite) (isopach only)
• Ordovician Stony Mountain Formation (structure and isopach)
• Ordovician Red River Formation (structure and isopach)
• Ordovician Red River Formation (Coronach Evaporite) (isopach only)
• Ordovician Red River Formation (Lake Alma Evaporite) (isopach only)
• Ordovician Winnipeg Formation (structure and isopach)
• Cambrian Deadwood Formation (structure and isopach)
• Precambrian (structure only)

Coming soon:

• Cretaceous Belly River Formation (Lower Odanah)
• Cretaceous Lea Park Formation (Millwood and Pembina)
• Cretaceous Milk River Formation (Gammon Ferruginous)
• Cretaceous Niobrara Formation
• Cretaceous Carlile Formation
• Cretaceous Second White Specks (Favel)
• Cretaceous Belle Fourche Formation
• Cretaceous Westgate Formation
• Cretaceous Newcastle Formation (Viking Sandstone)
• Cretaceous Joli Fou Formation (Skull Creek)
• Cretaceous Mannville Group (Swan River)
• Cretaceous Success Formation (S2)
• Jurassic Masefield Shale Formation (Waskada) + Success 1 (S1)
• Jurassic Rierdon Formation (Upper Melita)
• Jurassic Shaunavon Formation (Lower Melita)
• Jurassic Gravelbourg Formation (Reston)
• Jurassic Watrous Formation (Amaranth)
• Jurassic Upper Watrous Formation (Upper Amaranth Evaporite)
• Triassic Lower Watrous Formation (Lower Amaranth Red Beds)

  Instructions

• Moving the mouse over the geological periods listed under PERIOD will display a list of formations/groups in that Period.
   
• Selecting a formation/group will display the corresponding geology on the Map View on the left.
   
• Clicking on the Map View will allow you to choose the corresponding isopach or structure map in a printable PDF (1100 kb) format.

 PLEASE NOTE: The TGI stratigraphic column will only function properly with Internet Explorer 5.5 or higher.