四川盆地西部侏罗系沙溪庙组是河流—三角洲—滨浅湖沉积为主的红色砂泥岩系，天然气资源相当丰富。
Abundant in natural gas sources, Jurassic Shaximiao Formation in west Sichuan Basin is a red sandstone and shale mainly deposited in fluvial, deltaic shoal faces.
三角洲两侧的大鹏湾、大亚湾及上、下川岛建设地方中心深水港和专用深水港；
Secondly, the Yamen waterway can be exploited to build central and special- purpose ports for the west part of the delta area.
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