The Baigong pipes, which are also known as   (Bai Gongshan Iron Pipes) and Delingha pipes, are a series of pipe-like features identified by some as fossil trees or tree roots, found on and near White Mountain ( 'Mount Baigong'), about 40 kilometers southwest of the city of Delingha, in the Haixi Mongol and Tibetan Autonomous Prefecture, Qinghai Province, China.