Data for Figure E6 and E8.

Coal fires are common in Earth history and are associated with past climate change events. In the present work, we show that collieries in East Jharia, India, present coal fire-induced collapse structures, up to ten meters in diameter. Field examination supported by mineralogical and microstructural analysis, and coupled flow numerical modelling, shows larger isolated collapse structures to be the most thermally active and high emitters of combustion gas and heat to the atmosphere. These emissions are nearly twice those reported for UK territory in 2023.The data given in the two accompanying files are used in two figures in support of our analysis of paralava morphology and chemistry, and the key elemental differences between various transformation products (glass, monolayers, etc.) arising from the studied mine fire.