中国晚前寒武纪假裸枝叠层石科(新科)

本文扼要地介绍了中国东部9省(市、自治区)10个地区晚前寒武纪假裸枝叠层石科(新科)——PSEUPOGYMNOSOLENIDAE Liang,Cao,Zhang et Qiu(fam.nov.)的分布层位和时限范围及与共生的叠层石组合特征.并论述了新科的分类系统、生物学基础的初步研究成果。     

塔里木盆地库车坳陷侏罗系恰克马克组叠层石及其环境意义

详细研究了库车坳陷卡普沙良河剖面恰克马克组叠层石的形态及内部构造、微量元素、氧碳同位素特征。指出该叠层石的形成环境为咸水湖盆。从恰克马克组沉积为湖盆扩张期这一事实出发，认为叠层石的发育与干盐湖无关，而可以作为海泛存在的证据。     

ON PSEUDOGYMNOSOLENACEAE OF LATE PRECAMBRIAN IN CHINA

In this paper are summarized the distribution, horizon, time ranges, and assemblagecharacteristics of Pseudogymnosolenaceae Liang, Cao, Zhang et Qiu (fam. nov.) of Late Pre-cambrian in 10 areas belonging to 9 units of administration (provinces, cities and one auto-nomous region) in East China. The systematic classification and biological origin of thesestromatolites are also briefly discussed. The new family belongs to the micro-stromatolite type and is characterized by a smalland fine individuality, with a diameter mostly shorter than 1 cm, rarely 1--2 cm, a pseudo-columnar structure and an aspect of synchronous growing. It includes about 11 genera and54 species.