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陕西省地矿局第十三地质队一分队在山阳县芋园沟重晶石矿的普查过程中,于上奥陶统的千枚岩与薄层灰岩的接能处,在长200米,宽0.9米的范围内发现了Platystrophia sp。及Rostricellula sp。化石(西安地质矿产研究所傅力浦审定)。该化石的发现,在秦岭奥陶纪地层中尚属首次。这对该区上奥陶统的确定、秦岭生物地层区的划分及与兴安岭、新疆、欧洲等地的地层对比以及对秦岭板块构造的研究,均具一定的意义。
Shaanxi Provincial Bureau of Geology and Mineral Resources thirteenth geological team in Sanyang County Yoyuan ditch barite census process, in the upper Ordovician phyllite and thin-layer limestone to the Department at the long 200 Platystrophia sp was found within a range of 0.9 meters. And Rostricellula sp. Fossil (Xi’an Institute of Geology and Mineral Resources Fu Lisp validation). The discovery of this fossil is the first time in the Ordovician strata in the Qinling Mountains. This is of great significance to the determination of the Upper Ordovician, the division of the Qinling bio-stratigraphic zone, the stratigraphic correlation with the Xing’anling, Xinjiang and Europe as well as the study of the Qinling plate tectonics.