福建晚二叠世晚期有一次较大规模的海侵,在东部沉积了一套以含(竹蜓)灰岩为主的地层,称长兴组;西部为一套含菊石的粉砂岩、泥岩,称大隆组。二者以永安—龙岩白沙一线为界,与下伏的翠屏山组呈整合接触,与上覆的溪口组为连续过渡关系(图1)。大隆组 In the late Late Permian, Fujian Province, there was a large-scale transgression. In the eastern part of the Changxing Formation, a set of strata dominated by (bamboo-dragonfly) limestone was deposited, and a set of ammoniated siltstone and mudstone , Said Dalong group. Both of them take the Yong’an-Longyan Baisha line as a boundary, and they are in integrated contact with the underlying Cuipingshan formation and continuous transition with the overlying Xikou formation (Figure 1). Dalong group