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南京地区栖霞组臭灰岩段在含Misellina claudiae带之下,船山组Pseucloschwagerina带之上,广泛分布一层厚0.5—2.5m的页岩夹石灰岩层(以下简称为页岩层)。内含丰富的介形类、苔藓虫、双壳类、腕足类、有孔虫、珊瑚以及藻类等化石。笔者拟从沉积物中的生物标志、物理标志二方面阐明其环境意义。 代表剖面出露在南京城东20km的孔山北坡公路壁,自上而下层序如下:(图1)
The limestones of Qixia Formation in Nanjing area are distributed beneath the Misellina claudiae belt and the Pseucloschwagerina belt of Chuanshan Formation, and are widely distributed with shale limestone layers (hereinafter referred to as shale layers) 0.5-2.5m thick. Contains a wealth of types, bryozoans, bivalves, brachiopods, foraminifera, coral and algae and other fossils. I intend to clarify the environmental significance of sediment biomarkers, physical markers in two aspects. The representative profiles are exposed on the northern slope of Kongsan highway wall 20km east of Nanjing. The top-down sequence is as follows: (Fig.1)