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Science China Press

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新生代5个时期亚-非-澳洲季风区(绿色阴影)和干旱区(黄色阴影)分布 (a)中古新世(60Ma), (b)晚始新世(40Ma), (c)晚渐新世(25Ma), (d)晚中新世(10Ma), (e)现代(0Ma)。蓝色阴影区为海洋或湖泊，灰色廓线指示青藏高原及其周边1500m地形等高线

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