What is circular dating

Mysterious Fire Monument in England Predates Stonehenge by 800 Years The monument, which consists of two huge, circular enclosures — each outlined by tall, wooden posts — is about 5,300 years old, meaning the structure predates the first stones erected at nearby Stonehenge by about 800 years, the study found. Though the exact purpose of the Avebury monument is still shrouded in mystery,
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