The Izanagi sub-plate, the most active one of paleo-Pacific plate, subduction into east Asian with NW orientation during Jurassic, resulted in the NW compression and shortening of continental China and its adjacent areas in a whole, most areas of south China then suffered from contraction, inducing a series of small-scale intermountain basins; whereas for the eastern segment of Nanling, including most areas of western Fujian, southern Jiangxi and northern Guangdong, the stress was of extensional regime, resulted in the formation of rifting basins.

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