| Many experiments suggest that ancient subduction-related metasomatism affected OIB mantle sources long before island magmatism. |
| Both radiometric and biostratigraphic data indicate the onset of magmatism in late Mid-Jurassic time. |
| Our geochronology has identified major early Ordovician magmatism within the Slishwood Division. |
| In the northern Cordillera lower Paleozoic alkalic and potassic mafic magmatism is linked with rifting of the Selwyn Basin. |
| In both areas, the silicic magmatism is thought to have been a result of intrusion of mantle-derived mafic magmas into extending crust. |
| Prior to Cretaceous magmatism, the region underwent three major episodes of deformation. |
