Gorstian

EtymologyName formalityFormalName ratified1980Usage informationCelestial bodyEarthRegional usageGlobal (ICS)Time scale(s) usedICS Time ScaleDefinitionChronological unitAgeStratigraphic unitStageTime span formalityFormalLower boundary definitionFAD of the graptoliteLower boundary GSSP, Ludlow, U.K.
52°21′33″N2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772Lower GSSP ratified1980Upper boundary definitionImprecise. Near FAD of the graptolite Upper boundary definition candidatesNoneUpper boundary GSSP candidate section(s)NoneUpper boundary GSSP, Ludlow, England
52°21′33″N2°46′38″W / 52.3592°N 2.7772°W / 52.3592; -2.7772Upper GSSP ratified1980

In the geologic timescale, the Gorstian is an age of the Ludlow Epoch of the SilurianPeriod of the PaleozoicEra of the PhanerozoicEon that is comprehended between 426.7 ± 1.5 Ma and 425.0 ± 1.5 Ma (million years ago), approximately. The Gorstian Age succeeds the Homerian Age and precedes the Ludfordian Age. The age is named after village southwest of Ludlow. The base of the age is marked by . The type section is located in a quarry in the at , Shropshire, United Kingdom.