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There are mentions in papers from the 1980s, eg https://link.springer.com/article/10.1007%2FBF02507142 https://link.springer.com/article/10.1007%2FBF02507142
by fulafel 5y ago
There are mentions in papers from the 1980s, eg https://link.springer.com/article/10.1007%2FBF02507142 https://link.springer.com/article/10.1007%2FBF02507142
(edit: changed link, fixed from earlier where the context was minerals instead of climate and dates were in 70s)