Thanks for that. Other fun bits: mostly found in cratons; mostly from 70 and 150 Mya, but some >1200 Mya. The closest to a survey article I quickly found was

Thanks for that. Other fun bits: mostly found in cratons; mostly from 70 and 150 Mya, but some >1200 Mya. The closest to a survey article I quickly found was https://doi.org/10.2138/gselements.15.6.405 https://doi.org/10.2138/gselements.15.6.405 (on scihub).