a series of continental-source clastic sedimentary systemdeveloped during Silurian-Devonian period, in the mass, it belongs to deep watertrough mare basin and onshore environment;

• 志留系-泥盆系为一套陆源碎屑沉积体系,从总体上看,属深水凹槽海盆环境和滨岸环境中的陆源碎屑沉积;