弗拉斯期
- 网络frasnian;Frasnian stage
弗拉斯期
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甘肃西成铅锌矿田泥盆纪吉维特&弗拉斯期沉积古地理及控矿意义
The Sedimentary Paleogeography of Givetian-Frasnian ( Devonian ) and Its Ore-Controlling Significance in Xicheng Pb-Zn Orefield , Gansu Province
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晚泥盆世弗拉斯法门期(FrasnianFamennian)之间存在一次全球性生物绝灭事件(简称FF事件)。这次事件在西秦岭地区有所表现。
There existed an event of global mass extinction between the Frasnian and Famennian of the Late Devonian .