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英国学者Sedgwick、Murchison和Lapworth等早在19世纪便对奥陶系作出了先驱性的研究,包括创建了奥陶系。但百年来各国主要都集中于地区性的奥陶系研究,并建立了地区性的序列和标准,这在事实上一直都把英国的奥陶系划分作为国际间的对比标准。近三十年来,随着国际奥陶系分会不断推进各国奥陶系的研究工作,并在2007年完成了奥陶系三统七阶的全部全球层型剖面和点位(GSSP)的研究,建立了全球标准。为了便于运用,建议将奥陶系的三统七阶分为20个间隔段,以利于洲际对比,并把地区性的统与阶准确地对比到国际标准上去。同时附上与年代地层划分相一致的奥陶系全球碳同位素的变化曲线。
British academics Sedgwick, Murchison and Lapworth, as early as the 19th century made a pioneering study of the Ordovician, including the creation of the Ordovician. However, for centuries all countries have focused mainly on regional Ordovician research and established regional sequences and standards. In fact, the Ordovician division of the United Kingdom has long been regarded as an international comparative standard. In the recent three decades, with the continuous development of the Ordovician branch in the world, the Ordovician Branch of the International Commission of the Chinese People’s Liberation Army completed the research on the global stratigraphic section and point (GSSP) of the Ordovician three-stage and seven- Established a global standard For ease of use, it is suggested that the Ordovician system be divided into three levels and seven levels in 20 intervals to facilitate intercontinental comparison and to accurately compare regional unity with international standards. At the same time, the changes of Ordovician global carbon isotopes consistent with the stratigraphic dating of the Chronostrati are attached.