Yanartaş

Yanartaş ([janaɾˈtaʃ], Turkish for "flaming stone") is a geographical feature near the Olympos valley and national park in Antalya Province in southwestern Turkey.

The rest is made of hydrogen (7.5–11%), nitrogen (2–4.9%), light alkanes (0.57%), carbon dioxide (0.01–0.07%) and helium (80 ppmv).

These proportions and the isotopic composition indicates a mix from two origins, in equal part:[1] Abiotic methane ordinarily forms at temperatures much higher than those that occur in the rocks at Yanartaş.

However, ruthenium is present in the igneous rocks under the flames, and is believed to act as a catalyst, permitting the formation of methane at the lower temperatures (i.e., below 100 °C) that occur at Yanartaş.

[3] An Irish-born British naval officer named Francis Beaufort surveyed the region in 1811 and concluded that Yanartaş was the fabled mountain, citing the ancient Roman writer Pliny, who had made the same claim.