boundaries, in Nepal and adjacent parts of South Tibet (Fig. 1). Downloaded from http://sp.lyellcollection...PT The structural top of the GHS lies in south Tibet over part of the region, and is absent from some...extend northwards into the Kharta region of south Tibet, where the metamorphic evolution shows several features...the Kangshung valley east of Mt Everest, and at Thongmon, north of Kharta. The Kangshung locality revealed...between 20.5 and 16.7 Ma. At the more northerly Thongmon locality, ages >30 Ma were not found, but a migmatitic |