连滩组(Liantan Fm)曾称连滩页岩。时代属早志留世。分布于广东郁南连滩圩的文头山。为海相泥质沉积,下部为黄绿色板状页岩,中部为灰色至深灰色页岩,上部为黑色页岩,富含笔石,自下而上包含八个笔石带:①Glyptograptus aff.persculptus带,②Pristiograptus cyphus带,③Demirastrites triangulatus带,④Demirastrites convolutus带,⑤Monograptus sedgwickii带,⑥Streptograptus runcinatus Rastrites maximus带,⑦Streptograptus crispus带,⑧Monoclimacis cf griestoniensis带。本组共厚200米,与下伏奥陶系望江楼组呈整合接触。[1]