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Homerian

Subdivision of the Silurian according to the ICS, as of 2024.Vertical axis scale: Millions of years agoEtymologyName formalityFormalName ratified1980Usage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionFAD of the graptoliteCyrtograptus lundgreniLower boundary GSSP, Homer, England52°36′56″N2°33′53″W / 52.6156°N 2.5647°W / 52.6156; -2.5647Lower GSSP ratified1980Upper boundary definitionFAD of the graptolite (Colonograptus) variansUpper boundary GSSP, Ludlow, U.K.52°21′33″N2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772Upper GSSP ratified1980In the geologic timescale, the Homerian is an age of the Wenlock Epoch of the SilurianPeriod of the PaleozoicEra of the PhanerozoicEon that is comprehended between 430.6 ± 1.3 Ma and 426.7 ± 1.5 Ma (million years ago), approximately.

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