Robuta

https://gbank.gsj.jp/geolis/geolis_link/300043898/en Oligocene boron-bearing leucogranite formation evidenced by tourmaline-bearing nanogranite... oligocene boron bearing leucogranite formation https://popups.ulg.ac.be/1374-8505/index.php?id=6527&lang=en leucogranite leucogranite