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通过对柴达木盆地西部东柴山剖面上油砂山组和下油砂山组 Cyprideis 属化石的对比研究,划分出了如下四个种群类型: A.Cyprideis sp. (下油砂山组上部), B.C.shizigouensis (上油砂山组下部), C.C.posticlina (上油砂山组中下部), D.C.subeboliangensis (上油砂山组中上部)。经与砂新 1 井和砂 38 井对比,厘定了英东地区上油砂山组/下油砂山组的 Cyprideis 生物地层序列,并对 Cyprideis 各种群化石的鉴定特征作了简要总结。古生态特征所反映的沉积环境变化对高分辨率层序地层划分具有指导作用。
By comparing the Cyprideis fossils of the Youshashan Formation and the Lower Youshashan Formation on the Dongchaishan Formation in western Qaidam Basin, four types of fossils were identified: A.Cyprideis sp. (Upper Yanshaoshan Formation), BC shizigouensis (The lower part of Upper Yanshan Formation), CCposticlina (lower middle part of Upper Yanshan Formation) and DCsubeboliangensis (middle upper part of Upper Yansha Mountain Formation). Based on the comparison with the Shashen-1 well and Sha-38 well, the Cyprideis biostratigraphic sequence of the Upper Yanshan Shan Formation / Lower Xiaosanshan Formation of the Yingdong area was determined and the identification characteristics of various Cyprideis fossils were briefly summarized. The change of sedimentary environment reflected by paleoecological features can guide the stratigraphic division of high-resolution sequence.