International Commission on Stratigraphy
The International Commission on Stratigraphy (ICS) is the largest and oldest constituent scientific body in the International Union of Geological Sciences (IUGS). Its primary objective is to define precisely global units (systems, series and stages) of the International Chronostratigraphic Chart that, in turn, are the basis for the units (periods, epochs and age) of the International Geological Ti
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TimeScale Creator Pro
Amazon.co.jp: The Concise Geologic Time Scale: Ogg, James G., Ogg, Gabi, Gradstein, Felix M.: 本
