Also known as Middle Pleistocene, Ionian, Chibanian Age, Chibanian Stage
third age of the Pleistocene epoch
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~7 min read
Subdivision of the Quaternary according to the ICS, as of 2024. Vertical axis scale: Millions of years ago
Etymology Name formalityFormal Name ratifiedJanuary 2020 Synonym(s)Middle Pleistocene
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Discovered by embedding cosine similarity (sentence-transformers MiniLM, 384-dim).