Homerian

EtymologyName 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, England
52°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 ratified1980

In 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. The Homerian Age succeeds the Sheinwoodian Age and precedes the Gorstian Age.

The name comes from the small village of Homer, Shropshire near Much Wenlock. The defining lower boundary of Homerian rock layers (GSSP) is located within the Coalbrookdale Formation of England.