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大隆组是广泛发育于我国南方上二叠统顶部的地层单位,通常由含硅质、钙质的碎屑岩组成,并以产Pseudotirolites等菊石为特征。一般认为,它和许多地方上二叠统顶部发育的以产Palaeofusulina为特征的长兴灰岩相当。
The Dalong Formation is a stratigraphic unit widely developed at the top of the Upper Permian in southern China. It is usually composed of siliceous and calcareous clastic rocks and is characterized by the production of ammonites such as Pseudotirolites. It is generally believed that it is comparable to Changxing limestone, which is characterized by Palaeofusulina, which develops on top of the Permian in many places.