Orba Lake

Kotra Tso, also called Guozha Lake, lies among the glaciers of the western Kunlun, northwest of Bangda Lake. Ice and snow feed its high, enclosed basin from a catchment containing dozens of glaciers. Sediments beneath Kotra Tso record a long change in its waters: the lake became isolated thousands of years ago and grew saltier as the supply of glacial meltwater declined. Snow-covered peaks surround the broad lake on the plateau.