广西有孔虫藻核形石

FORAMINIFERAL ALGAL ONCOLITES FROM GUANGXI

Regianal Geological Survey Party, Guangxi Bureau of Geology and Mineral Resources

摘要: Johnso (1946)认为Osagia是由蓝藻(多孔层)和壳层有孔虫组成的。广西有孔虫藻核形石和国外报导的Osagia的特征基本相同,笔者称之为广西Osagia,主要产于广西六寨中泥盆统泥晶灰岩中,单层厚0.5—3m左右。下伏岩层为中泥盆统泥晶灰岩,上覆岩层为中泥盆统珊瑚层孔虫礁灰岩。横向相变为中泥盆统竹节石泥岩或竹节石硅质泥岩。

Abstract: Foraminiferal algal oncolites are commonly known as Osagia. The foraminiferal algal oncolites reported here were discovered by the author in 1985 in the Middle Devonian micritic limestones in Liuzhai. Guangxi. This paper deals with the common characteristics and environments for the formation of the oncolites from the study area.