Each grain of sand on the planet came from a rock that weathered down to almost nothing. Studying these remains helps us to piece together what the earth was like when that rock was formed, millions even billions of years ago.
Now, thanks to a new technique developed by researchers in Australia, home of oldest known grain of sand, we can look back in time at the ancient settings in which these sediments were dispersed to uncover clues about Earth’s earliest tectonic processes.
Source Material:
‘Understanding ancient tectonic settings through detrital zircon analysis’
https://www.sciencedirect.com/science/article/pii/S0012821X22000619
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