滇西保山地区岩关（杜内）阶至大塘（维宪）阶界线  

BIOSTRATIGRAPHICAL BOUNDARY BETWEEN THE YANGUANIAN AND DATANGIAN IN BAOSHAN AREA, WESTERN YUNNAN

作　　者：姜建军[1] 

机构地区：[1]地质矿产部国际合作司

出　　处：《现代地质》1994年第4期421-429,共9页Geoscience

基　　金：自然科学基金

摘　　要：依据保山地区岩关晚期地层至大塘早期地层连续发育，化石丰富及动物群既具酉欧区系分子，又具北美区系分子等特征，提出这一地区是我国岩关阶至大塘阶界线层型理想地区，易于与西欧和北美地层对比。On the basis of brachiopods, the biostratigraphical boundary between the Yanguanianand Dantangian in the South China was put previously between the Eochoristites-MartinielMartiniella assemblage and the Megachonetes zimmermani-Delepinea subcarinata assemblage. Thepresent study shows that Syringothyris texta-Productina margaritacea Delepinea subcarinata assemblage represents the lowest horizon of the-Datangian (Visean), which may correlate directly with the V1a zone of Belguim and the Keokuk limestone of the United States.

关 键 词：岩关阶 大塘阶 生物地层 界线 滇西 石炭纪 

分 类 号：Q911.645[天文地球—古生物学与地层学]