On The Geologic Time Scale

This report summarizes the international divisions and ages in the Geologic Time Scale, published
\nin 2012 (GTS2012). Since 2004, when GTS2004 was detailed, major developments have taken place
\nthat directly bear and have considerable impact on the intricate science of geologic time scaling. Precam brian
\nnow has a detailed proposal for chronostratigraphic subdivision instead of an outdated and abstract chronometric
\none. Of 100 chronostratigraphic units in the Phanerozoic 63 now have formal definitions, but stable
\nchronostratigraphy in part of upper Paleozoic, Triassic and Middle Jurassic/Lower Cretaceous is still wanting.
\nDetailed age calibration now exist between radiometric…