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A comment on Could an Industrial Civilization Have Predated Humans on Earth?. Parent comment

Re:Could an Industrial Civilization Have Predated Humans on ... by inglor_cz on Saturday July 15, 2023 @02:48PM (#36739780)
Not all metal. Buried gold retrieved from ancient graves looks very "fresh".
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Re:Could an Industrial Civilization Have Predated Humans on ... by jiggawatts on Saturday July 15, 2023 @07:04PM (#36741712)
Also most of the noble metals would remain pristine: platinum, iridium, etc…
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Re:Could an Industrial Civilization Have Predated Humans on ... by MichaelZuo on Saturday July 15, 2023 @08:59PM (#36742422)
After ten million years even a large gold ingot would entirely be subsumed by the surrounding matter. Assuming a 10 nanometer/year erosion.
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