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广西北流县城郊贵塘、官冲、大风门一带泥盆纪生物礁十分发育,有六个层位的生物礁层。造礁时间主要从早泥盆世晚期到晚泥盆世。层位为下泥盆统北流组贵塘段上部和中泥盆统东岗岭组至上泥盆统融县组(图1、2)。现仅就生物礁特征作如下介绍。
There are six layers of reef layers in Devonian reefs along Guantang, Guanchong and Dalyanmen in the suburb of Beiliu County, Guangxi. Reef-forming time mainly from the late Devonian to Late Devonian. The horizon is the upper part of the Lower Devonian Beiliu Formation in the upper part of the Guitang section and the Middle Devonian Donggangling Formation to the Upper Devonian Rongxian Formation (Figure 1 and 2). The features of reefs are described below.