k-t65seattle.html


Cretaceous-Tertiary Tectonics and Paleogeography (65 Ma).

Latest Cretaceous - Early Tertiary (65 Ma)
  • Triple junction and Baja BC moved rapidly northward
  • Intermontane terranes translated to north
  • Forearc sedimentation (Franciscan-Great Valley) continued along southern margin
  • Uplift of Coast plutonic complex generated large deep-sea fan deposits (Chugach flysch)
  • Strong Sevier thrusting and foreland basin
  • Laramide orogeny: Farallon Plate shallow subduction caused expansion NE of foreland uplifts and basins
  • Late Cretaceous-Tertiary Tectonic Map and Paleogeographic Map