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ostracod n.介形亞綱 (Ostracoda) 動物。

ostrava

The volcanic rock age and the age of the qiangtang formation determined the wudaoliang group between 20 - 5ma , discovering a flood of spore and pollen with ostracods fossils ( regard eucypris as principle ) , which are miocene epoches typical numerator , therefore wudaoliang group accumulate in miocene epoch is doubtless ; 9 - 2ma are the age of the suonahu formation based on the data of the esr , which were characteristic of later period in miocene epoch - pliocene epoch , spore and pollen with fossil all were miocene epoch period 由火山巖和覆于其上的羌塘組的年齡限定五道梁群的沉積時間為20 - 5ma ,五道梁群中發現大量的孢粉和介形蟲化石(以eucypris為主) ,分析認為它們都是中新世時期的典型分子,因此五道梁群的沉積時間為中新世是無疑的;嗩吶湖組的esr測年數據范圍為9 - 2ma ,代表中新世晚期?上新世時期,孢粉和化石都具有中新世時期的特征。