World's Only Moving Mud Puddle

Imagine an underground deposit of geologic baking soda, and an acidic watertable neaby, an earthquake releases water into the geologic baking soda, and that forms a geologic carbonator, like in a soda fountain, it compresses CO2 into water, which makes it MORE acidic, and that acts like an acidic waterjet cutter slicing upwards with both waterpressure and carbonic acid (CO2 infused into water is carbonic acid), but this geologic baking soda is in a lateral vein (possibly a buried deposit of volcanic ash) as the reaction peters out in one region it allows untouched material further along the vein to react much like a fuse, thus you could get the "Moving" effect.  What if there is a massive deposit of this geologic baking soda that has a large surface area, such that it can react very quickly?  How deep is it and can it generate enough pressure to exceed both friction and gravitational acceleration?   Could we be facing a potential geologic sized soda bomb?  If it begins to life the surface ground, that would create more volume, and allow the CO2 to escape causing a pressure spike lifting the round more, it could result in a cascade explosion, much like the YellowStone Super caldera did, only not molten, but fizzy,  Still destructive if a foamy house lands on you.