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| Keywords | |
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Neoproterozoic |
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Longshan Formation |
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microfossil |
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Yanshan region |
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acanthophorous acritarch |
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| PubMed | |
New data of microfossils from Neoproterozoic Longshan Formation in Yanshan region
LIU Huan, ZHU Shi-xing, TIAN Hui, ZHANG Jian
Tianjin Center of Geological Survey, China Geological Survey, Tianjin 300170, China
On the basis of chemical soaking and sieving analysis, a large number of microfossils were found from the mudstones and shales of Neoproterozoic Longshan Formaton in Yanshan region, comprising of Leiosphaeridia, Trachysphaeridium, Satka, Favososphaeridium, Tanarium, Siphonophycus, Oscillatoriopsis, Laminarites and so on. The fossil assemblage is characterized by:(1) dominance of monosphaeritae and polysphaeritae, with complex sculptures; (2) occurrence of a lot of small sized acanthophorous acritarchs; (3) existence of metaphytes. The new material enriches the microfossil assemblage of the Longshan Formaiton, and provides more evidence for regional stratigraphic correlation.