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PaST Thesaurus Navigator

Use this page to navigate the Paleoenvironmental Standard Terms (PaST) thesaurus and discover information about terms such as definitions, relations, and vocabulary hierarchies.


year Common Era
an age unit of years for the Julian and Gregorian calendars relative to the start of the present era. Times prior to the start of the present era are expressed as negative values.
ROOT > unit > time unit > age unit > year Common Era

Non Preferred Terms

year AD
years AD
yr AD
yrs AD

Broader Terms

age unit
Measured Variable Terms
This page is used for exploring the WDS-Paleo controlled vocabulary for measured variables (PaST Thesaurus). A term's title and description will appear here. Terms marked as 'metaterm' are not searchable in the Variables Advanced Search, but serve to organize terms into a hierarchy.