中国科学院南京地质古生物研究所机构知识库

通过对山东临沂寒武系朱砂洞组页岩样品进行酸解浸泡分析处理,获得了数量丰富的、以隐孢子与疑源类化石标本共同出现的微体化石组合,为华北板块寒武系微体化石研究提供了新资料。隐孢子标本具有明显的寒武纪已知隐孢子形态特征,属种包括Adinosporus voluminosus,A.cf.bullatus,Adinosporus sp.,Vidalgea maculata;疑源类4属5种(含3个未定种),包括Asteridium tornatum,Heliosphaeridium obscurum,Leiosphaeridia sp.,Leiosphaeridia sp.A,Synsphaeridium sp.。上述微体化石组合特征进一步表明研究区在早寒武世中期为浅水的潮坪沉积环境,陆源物质的搬运可能导致了隐孢子在浅海相地层的出现,或者浅水潮坪环境适宜产出隐孢子的母体植物的繁衍。

Quantities of organic-walled microfossils including cryptospores and acritarchs,are found in the Cambrian Zhushadong Formation of Linyi,Shandong Province by acid maceration technique,which significantly enriches the data for Cambrian microfossil research in north China.By their morphological characters,the cryptospores of the Zhushadong Formation are identified as Adinosporus voluminosus,A.cf.bullatus,A.sp.,Vidalgea maculata,and acritarchs preserved together include 4 morphological genera and 5 species,including Asteridium tornatum,Heliosphae-ridium obscurum,Leiosphaeridia sp.,Leiosphaeridia sp.A,Synsphaeridium sp..The new discovery of organic-walled microfossils indicates that the lower Cambrian Zhushadong Formation was deposited in adlittoral tidal flat environment.The cryptospores were either dispersed from parent plants which lived in nearshore environment,or transported together with terrestrial clasts.