Early Jurassic Tectonics and Paleogeography
(180 Ma).
Early to Middle Jurassic (180 Ma)
¬…Fringing
Cordilleran arc accreted to western North America including Bridge River, North
Cascades, western parts of Eastern Oregon terranes, and western terranes of
Klamaths and Sierra Nevada
¬…Older
Mesozoic back arc basins closed
Early Jurassic Tectonic Map and Paleogeographic Map
Early Jurassic Tectonic Map and Paleogeographic Map