摘要
震旦纪地层是本区新发现的地层单位,由含泥砾白云岩,砾岩(冰碛岩?)、含砾白云岩、板岩(夹硅质岩)及白云岩组成,最大出露厚度349.13m。含微古植物8属4种5未定种,宏观藻类1属1未定种,核形石1群2型;获铷—锶法等时线年龄值606Ma。
As a newly discovered stratigraphic unit,the Sinian strata of this area are composed ofboulderclay dolostone,conglomerate(tillite?),gravel—bearing dolostone,slate(intercalated by sili-calite)and dolostone with 349.13m maximum outcropped thickness.Micropaleobetanyly 8 genera,4species,5 undefined species,macroalgae 1 genus,1 undefined species and oncolite 1 group,2 typeshave been found in the strata.Isotime line age is 606Ma by rubidium—strontium method
关键词
震旦纪
地层
中祁连山
龙口门地区
Sinian System
the Eastern Middle-Qilian Mountain
