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Q&A What is the oldest a cave could possibly be?

What is the oldest a still extant cave on Earth could be? What conditions could encourage the longevity of a cave? It seems that the oldest known caves, the Jenolan Caves in Australia, formed i...

3 answers  ·  posted 7y ago by tinydoctor‭  ·  last activity 7y ago by tinydoctor‭

Question caves geology alternate-history history ancient-history