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在加拿大、美国、苏联、澳大利亚、法国和比利时等地,对跨越弗拉斯阶—法门阶(简称F-F)界线的14条削面进行了采样,测定了主要元素的氧化物(如SiO_2,Al_2O_3、CaO、MgO、Na_2O、K_2O、CO_2,Fe_2O_3、MnO、TiO_2)、微量元素(如Cu、Pb、ZQ,Co、Ni、As和Sb)及稳定同位素(C,O和S)的含量。美国新墨西哥州洛斯阿拉莫斯国家实验室还对采自F-F界线附近的亲铁元素含量高的样品作了铱、铂,锇、金含量分析,而对有些样品作了
In Canada, the United States, the United States, the Soviet Union, Australia, France and Belgium, 14 facets across the Fras-Famenian boundary (FF) were sampled and the oxides of the major elements such as SiO 2, Al 2 O 3, CaO, MgO, Na_2O, K_2O, CO_2, Fe_2O_3, MnO, TiO_2, trace elements such as Cu, Pb, ZQ, Co, Ni, As and Sb and stable isotopes (C, O and S). Los Alamos National Laboratory in New Mexico also made iridium, platinum, osmium and gold content analysis on samples with high pro-iron content collected near the F-F boundary. For some samples,