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Induan

Subdivision of the Triassic according to the ICS, as of 2024.Vertical axis scale: Millions of years agoEtymologyName formalityFormalUsage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionFAD of the ConodontHindeodus parvusLower boundary GSSPMeishan, Zhejiang, China31°04′47″N119°42′21″E / 31.0798°N 119.7058°E / 31.0798; 119.7058Lower GSSP ratified2001Upper boundary definitionNot formally definedUpper boundary definition candidatesFAD of the Conodont Neospathodus waageniUpper boundary GSSP candidate section(s)Mud (Muth) village, Spiti valley, IndiaThe Induan is the first age of the Early Triassicepoch in the geologic timescale, or the lowest stage of the Lower Triassicseries in chronostratigraphy.

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