藏北無人區讓人迷醉的奇特地貌
<p align="center"><font color="Blue">藏北無人區位于青藏高原腹地。北部昆侖山一帶于二疊紀末隆起脫離特提斯海（古地中海），至晚白堊紀藏北地區全部成陸；在上新世後的數次新構造運動中又被整體抬升而成現今之藏北高原，平均海拔5000米左右，地形復雜，地貌奇特。1993年，藏北無人區成立了“羌塘國家級自然保護區”。其保護的對象主要為藏羚羊、野犛牛、藏野驢、盤羊及草原生態，面積達29.8萬平方公裡。藏北無人區的奇特地貌，對于研究青藏高原的形成、演化和發展以及開展科學探險旅遊和生態旅遊均具有重要價值。<br>
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