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Guzhangian

Subdivision of the Cambrian according to the ICS, as of 2024.Vertical axis scale: Millions of years agoEtymologyName formalityFormalName ratified2008Former name(s)Cambrian Stage 7Usage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageFirst proposed byShanchi et al., 2007Time span formalityFormalLower boundary definitionFAD of the TrilobiteLejopyge laevigataLower boundary GSSPLuoyixi section, Luoyixi, Guzhang, Hunan, China28°43′12″N109°57′53″E / 28.7200°N 109.9647°E / 28.7200; 109.9647Lower GSSP ratified2008Upper boundary definitionFAD of the TrilobiteGlyptagnostus reticulatusUpper boundary GSSPPaibi section, Paibi, Hunan, China28°23′22″N109°31′33″E / 28.3895°N 109.5257°E / 28.3895; 109.5257Upper GSSP ratified200328°43′12″N109°57′53″E / 28.7200°N 109.9647°E / 28.7200; 109.9647 The Guzhangian is an uppermost stage of the Miaolingian Series of the Cambrian.

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