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沙洲地区沙1井牙形石可划分为两个化石组合带:(1)Neogondolella subcarinatasubcarinata-Neog.subcarinata elongata带,代表长兴组下部;(2)Neog.subcarinatachangxingensis-Neog.carinata带,代表长兴组上部。
The conodont of Sha 1 well in Shazhou area can be divided into two fossil assemblages: (1) Neogondolella subcarinataubcarinata-Neog.subcarinata elongata zone, representing the lower part of Changxing Formation; (2) Neog.subcarinatachangxingensis-Neog.carinata zone, representing the upper part of Changxing Formation .