Kohlendioxidquelle im Gelenberger Wald
Many years ago it was believed that the release of carbon dioxide was a sign of extinct volcanism. But this is not the case: the molten rock inside the earth (magma) contains, in addition to mineral components, gases such as carbon dioxide, water vapor, sulfur dioxide, fluorine and chlorine. Depending on how warm it is and how much pressure is created, they escape through cracks in the earth's crust. The source of carbon dioxide in the Gelenberg Forest is a Mofette.