四川长宁双河附近的志留系,地层名称以往均沿用邻区已有的名称。由于岩相的变化,与奥陶系一样,志留系也有其特殊性。志留系下统和中统发育较好,下统笔石柏页岩发育,下统上部至中统的介壳相地层中,灰岩甚少,与华中区其它地方的志留系显然不同,本文建立两个新的地层单位。 Silurian near Shuanghe, Changning, Sichuan, the strata name used to be the existing name of the neighborhood. Due to the change of lithofacies, similar to Ordovician, Silurian has its own particularity. The Lower Silurian and Central Plains developed well, and the Lower Pencil shale developed. In the Lower Middle Paleolithic to Middle Mesozoic strata, there are very few limestones, which are obviously different from Silurian in other parts of Central China. This article establishes two new strata units.