学科分类
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1 个结果
  • 简介:DefinitionofanewgeologicperiodfortheIastintervaloftheProterozoicEon,theEdiacaran,wasrecentlyratifiedbytheIUGS.TheEdiacaranPeriodisthefirstProterozoicperiodtoberecognizedonthebasisofchronostratigraphiccriteria,thefirstinternationallyratified,chronostratigraphicallydefinedperiodofanyagetobeintroducedinmorethan120years,andthefirsttobedefinedbya“goldenspike”intheSouthernhemisphere.

  • 标签: 埃迪卡拉生物种群 地理周期 古生代 地层年代