PALYNOLOGICAL RECORDS OF THE HOLOCENE ENVIRONMENTAL CHANGES IN ZHENGLAN QI, INNER MONGOLIA

The Holocene vegetation and climatic evolution in central Inner Mongolia was reconstructed according to the palynological records of the Shandianhe section in Zhenglan Qi.The vegetation was dominated by steppe or sparse steppe in the early Holocene,corresponding to a warm and dry climate.The vegetation in the middle Holocene was forest-type,indicating a relatively warm-wet climate.During the late Holocene,the vegetation again changed to steppe or sparse steppe,suggesting that the climate tended to be warm-slightly dry or cool-slightly dry.