Hottest known temp in rock formation found to be 2,370ÂºC
A Canada-based study has found that a glass rock, unearthed from a 28-km-wide impact crater, was formed at 2,370ÂºC, the hottest rock formation temperature on Earth. The temperature was calculated from traces of the mineral Zircon in the rock. The crater was formed 38 million years ago due to an asteroid striking at an estimated speed of 54,000 kmph.