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→Bubble Geysers
== Bubble Geysers ==
In a similar process as the breakdown that leads to fossil fuels (although very early stages) large amounts of plant-matter can breakdown into glycerin that trap bubbles of air. These bubbles, after years of being trapped underground, can build enough pressure to break through the surface, creating sinkholes and potentially damaging structures. As the pressures build and diminish as they initially rise, creatures are entitled to a DC 25 survival check every round for one minute prior to the pressure release.