hiililähteitä
Hiililähteitä, often translated as "coal springs" or "coal seeps," are geological formations where liquid or gaseous hydrocarbons, primarily coalbed methane and oil, naturally escape from underground coal deposits to the surface. These occurrences are less common than oil or gas seeps from other rock types due to the porous nature of coal which tends to retain hydrocarbons more effectively. However, when pressure or geological faulting allows, these resources can migrate upwards.
The formation of hiililähteitä is linked to the processes of coalification, where organic matter is transformed
Historically, hiililähteitä were sometimes observed by indigenous peoples and early explorers, and in some instances, their