Permian Tectonics and Paleogeography (290 Ma).

Permian

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