ASPRO chronology - Wikipedia

The ASPRO chronology is a nine-period dating system of the ancient Near East used by the Maison de l'Orient et de la Méditerranée for archaeological sites aged between 14,000 and 5,700 BP.
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ASPRO chronology - Wikipedia

Re: Lichenometry dating

Circa - Wikipedia Circa (from Latin, meaning 'around, about') - frequently abbreviated c., ca., or ca (and less frequently circ. or cca.) – signifies 'approximately' in several European languages (and as a loanword in English), usually in reference to a date. Circa is widely used in historical writing when the dates of events are not accurately known.