garmgeolhist.html

Early Permian Paleogeography of Greater Ancestral Rocky Mountains

Paleogeography and Geologic Evolution of Ancestral Rocky Mountains

Images from poster session at GSA Annual Meeting, Salt Lake City, October, 2005

Paleogeographic Maps and Subsidence and Uplift History

note: abbreviations for basins appear on map when those features were active; see Basin Subsidence History and Uplift History for key to abbreviations. North American views (NAM) show broad, regional setting of SW North America. Other abbreviations -- PGT: Peri-Gondwanan terranes; QU: Quesnell; ST: Stikine


  • Location Map
  • Map of Tectonic Elememts
  • Basin Subsidence History
  • Uplift History

  • Late Permian (255 Ma)
  • Early Triassic (240 Ma)
  • Middle Triassic NAM

  • Early Permian (278 Ma) Coconino
  • Early Permian (275 Ma) Toroweap
  • Middle Permian (270 Ma) Kaibab
  • Late Permian (260 Ma) Park City

  • Early Permian (290 Ma)
  • Early Permian (287 Ma) Cedar Mesa
  • Early Permian (285 Ma) Hermit
  • Early Permian (280 Ma) De Chelly)

  • Penn Des Moines (310 Ma)
  • Penn Missou (300 Ma)
  • Penn Virgil (295 Ma)
  • Late Penn NAM)

  • Penn-Miss lowstand (320 Ma)
  • Penn Morrow (318 Ma)
  • Penn Atoka (315 Ma)

  • Middle Devonian NAM (370 Ma)
  • Early Miss (340Ma)
  • Late Miss (325 Ma)

    • Return to Return to Sedimentary Basins SW North America