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.
出处
《现代地质》
CAS
CSCD
1994年第4期421-429,共9页
Geoscience
基金
自然科学基金