The coastal area around Southeastern Fujian is located in the Changle-Nan ao tectonic zone, where mafic dikes (swarms) were developed since late Mesozoic.

• 闽东南沿海地处长乐-南澳构造带内,发育晚中生代以来的基性岩脉(岩群),其几何形态和产状记录着区域应力场活动。