Delayed phase change due to hot asthenosphere causes Transantarctic uplift?

The uplift of the Transantarctic Mountains is presently attributed to the delayed effect of the overriding, by east Antarctica, of an anomalously hot asthenosphere forming under west Antarctica in the late Cretaceous. Temperature and mantle heat flux increases cause an inferred uplift rate of 90 m/Myr about 50 Myr later. The late Cenozoic volcanism in the Transantarctic Mountains, typified by Victoria Land activity, is attributed to the previously heated continental lithosphere's overriding hot asthenosphere, which was brought under Antarctica upon its separation from Australia.