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https://theconversation.com/plastic-rocks-plutonium-and-chicken-bones-the-markers-were-laying-down-in-deep-time-209788>
"Rocks keep time. Not on our human-scale time, but deep time: the almost
unimaginable span of billions of years which have already come and gone.
Let’s say you’re in the far future and you’re looking for evidence of previous
civilisations. Where would you look? The first place would be in the rocks.
For decades, experts have debated whether our world-spanning impact on the
planet represents the sign of a new geological period, the Anthropocene. Only
recently, scientists selected a small lake in Canada as the site that best
records our impact.
That’s because the waters of the lake don’t mix, which means sediment falling
into the lake is laid down neatly and in incredible detail. Over long periods,
the lake’s varved sediments have preserved an excellent, undisturbed record of
the Anthropocene.
But what would have to be in those sediments to leave indelible evidence of our
presence? Here are five of the markers we’re leaving for the future."
Cheers,
*** Xanni ***
--
mailto:xanni@xanadu.net Andrew Pam
http://xanadu.com.au/ Chief Scientist, Xanadu
https://glasswings.com.au/ Partner, Glass Wings
https://sericyb.com.au/ Manager, Serious Cybernetics
