In June 2016 the Paleogene,Neogene,and Quaternary subcommissions(ISPS,SNS,SQS)of the International Commission on Stratigraphy(ICS)voted on whether to formalize sub-series and their geochronologic equivalents,sub-epoch...In June 2016 the Paleogene,Neogene,and Quaternary subcommissions(ISPS,SNS,SQS)of the International Commission on Stratigraphy(ICS)voted on whether to formalize sub-series and their geochronologic equivalents,sub-epochs.The vote required a 60 percent majority for the proposal to be forwarded to the ICS for further consideration.That majority was not achieved,albeit by a narrow margin,hence sub-series and sub-epochs are currently to be regarded as informal,and if used should carry a lower case modifier,as in lower Miocene and early Pleistocene.To accompany the vote,those who favoured continuation of informal usage were asked to prepare a short summary of the main arguments in support of their viewpoint.展开更多
文摘In June 2016 the Paleogene,Neogene,and Quaternary subcommissions(ISPS,SNS,SQS)of the International Commission on Stratigraphy(ICS)voted on whether to formalize sub-series and their geochronologic equivalents,sub-epochs.The vote required a 60 percent majority for the proposal to be forwarded to the ICS for further consideration.That majority was not achieved,albeit by a narrow margin,hence sub-series and sub-epochs are currently to be regarded as informal,and if used should carry a lower case modifier,as in lower Miocene and early Pleistocene.To accompany the vote,those who favoured continuation of informal usage were asked to prepare a short summary of the main arguments in support of their viewpoint.
