贵州罗甸濛江中三叠统许满组牙形刺的发现及其地层意义  

Discovery of Conodonts in Xuman Formation of Middle Triassic of Mengjiang in Luodian County, Guizhou and Its Stratigraphic Significance

作　　者：王红梅[1] 

机构地区：[1]贵州省地质矿产勘查开发局区域地质调查研究院

出　　处：《贵州地质》1996年第3期220-224,共5页Guizhou Geology

摘　　要：通过对罗甸江中三叠统许满组４件牙形刺样品的处理分析，发现了一批牙形刺化石，经研究，这些牙形刺分属８属６种和６个未定种，并自上而下建立了两个牙形刺带：②Ｎｅｏｇｏｎｄｏｌｅｌｌａｅｘｃｅｌｓａ─Ｇｌａｄｉｇｏｎｄｏｌｅｌｌａｔｅｔｈｙｄｉｓ带及①Ｎｅｏｇｏｎｄｏｌｅｌｌａｃｏｎｓｔｒｉｃｔａ带。罗甸江中三叠世牙形刺的发现对解决深水盆地相许满组的时代和对比都具有重要意义。Large number of conodont fossils are found out in processing and analysing 4 samples of cbnodonts from Middle Triassic Xuman Formation of Mengjiang in Luodian county. They are to belong respectively to 8 genus, 6 species and 6 species indet.. Two conodont zones have been established, in descending order, including 2 Neogondolella excelsa-Gladigondolella tethydis Zone and 1 Neogondolella Constrict a Zone. This discovery of Middle Triassic conodonts from Mengjiang in Luodian county is of great implication for age determination and stratigraphic correlation of Xulnan Formation of deep-water basin factes.

关 键 词：牙形刺 中三叠世 许满组 贵州 罗甸Meng江 地层 

分 类 号：Q915.651[天文地球—古生物学与地层学]