Ruins of Desert Cathay 242 - Large dunes on marshy ground in head-waers basin of the Su-lo Ho. Elevation circa 13,400 feet. The glacier crowned peaks in distance belong to Shagolin-Namjil range. In between the high mountain ranges of the Nan-shan the Su-lo Ho flows north-west and then turns sharply west to flow into the Tarim Basin south of the Lop salt sea.