The time span saw the paleovegetational evolution from broadleaf tree and bush lush grassland through bush spotting grassland to desert grassland.

 
  • 研究表明,此期間該區植被由闊葉、灌木草原變?yōu)槭铇?shù)灌木草原,最后變?yōu)榛哪菰?/strong>
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附錄 查詞歷史
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