Cretaceous granitic intrusive activity was widespread in the Kahiltna terrane. This scenario then permits rapid transport north of crustal blocks such as the Yakutat terrane. The fault runs along an ancient Precambrian terrane boundary. The collision of the Patagonian terrane with the southwestern Gondwanan occurred in the late Paleozoic. The westernmost microcontinental ribbon terrane is the King Island element. The Lhasa terrane moved northward and collided with the Qiangtang terrane along the Bangong suture. Each accretion left a terrane of rock of a single age. The Mother Lode coincides with the suture line of a terrane, the Smartville Block. The next oldest group of rocks is the Farewell terrane. The Indus Suture Zone is the suture zone with the Lhasa terrane to the North. The oldest rocks in the park are part of the Yukon-Tanana terrane. Shear zones are therefore very important structures for unravelling the history of a specific terrane. Today the Bangong suture separates the Lhasa terrane from the Qiangtang terrane. The former Lhasa prefecture lies in the Lhasa terrane, to which it gives its name. These three zones are part of one terrane.