1. ESCI 536 - Rocky Mountains FT Precambrian-Cambrian Stratigraphy & Paleogeography: North American Cordillera February 3, 2010 J. Morgan

2. Precambrian Crystalline Basement & Belt Supergroup (Stewart & Suczec, 1977) 2400-1500 m.y. 1500-900 m.y.

3. Diamictite & Volcanic Sequences (Stewart & Suczec, 1977) 900-800 m.y.

4. 2400-1500 m.y. 1500-900 m.y. (Stewart & Suczec, 1977) 900-800 m.y. 650-540 m.y. 540-500 m.y. Shallow water carbonates Shallow water terrigenous sediments Local diamictite, volcanics & more Proterozoic basement Belt supergroup (correlative)

5. Stratigraphy PC: Crystalline rocks UPC: Discontinuous, locally up to 3000 m of diamictite, mudstone, sandstone, cgl, & mafic volcanics UPC-LC: Westward thickening wedge, locally > 6000 m, of terrigenous detrital rocks MC-UC: Predominantly shallow water carbonates, up to 2000 m thick Belt Supergroup (N Cordielleran)

6. Precambrian & Cambrian Stratigraphy (Stewart & Suczec, 1977)

7. Late Precambrian-Cambrian Evolution, Western NA (Stewart & Suczec, 1977) Late Precambrian rifting (850 m.a.)

8. Stratigraphy PC: Crystalline rocks UPC: Discontinuous, locally up to 3000 m of diamictite, mudstone, sandstone, cgl, & mafic volcanics UPC-LC: Westward thickening wedge, locally > 6000 m, of terrigenous detrital rocks MC-UC: Predominantly shallow water carbonates, up to 2000 m thick Craton Deposition in local rift valleys Rapid erosion of uplifted rift margins Accumulation on subsided shallow-water shelf

9. Lower Paleozoic Rifted Margin

10. Laramide Reactivation of Basement Structures

11. Inherited Structural Trends Cotton- wood Canyon