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一、沉积环境分区下青龙组第一段(早三叠世印度期)的沉积环境.以江阴—宜兴北东向水下隆起为界,可分为三区,即其南北两侧为深水陆棚,水下隆起带为浅水陆棚。下青龙组第一段.在宜兴张渚、广德牛头山、沙洲妙桥、溧阳上黄一带水下隆起带上,除底部见数米厚的泥岩、页岩夹泥灰岩外,均为薄层水平纹层状泥晶灰岩夹多层块状同生砾屑灰岩。底部直接与晚二叠世龙潭煤系假整合接触,缺失长兴组。而隆起带的北侧,南京、
I. Sedimentary environment of the first segment of the Qinglong Formation under the sedimentary environment division (Early Triassic Indian period) The boundary can be divided into three regions by the northeast subduction of Jiangyin-Yixing, that is, Shed, underwater uplift for shallow water shelter. Under the Qinglong Formation in the first paragraph in Yixing Zhangzhu, Guangde Niu Toushan, Shazhou Miao Qiao, Liyang Shanghuang underwater uplift belt, in addition to see the bottom of a few meters thick mudstone, shale clip marl, are Lamellar horizontal grain laminated limestone clapboard with multi-block massive bornite limestone. The bottom directly with Late Permian Longtan coal system integration contact, the lack of Changxing group. The north side of the uplift, Nanjing,