Permian Tectonics and Paleogeography (290 Ma).
Mc Cloud arc fragmented during late Paleozoic truncation of SW North America
Assembly of western Pangaea completed
Transform margin coupled Mc Cloud arc with arcs built on Chortis and South America
Havallah back arc basin (HB) and Slide Mtn back arc separated northern arc, Quesnellia (Q), from Antler belt (A) and western North America
Permian Tectonic Map and Paleogeographic Map