The bubbling is due to degassing of a cooling magma chamber below the spring. Soda springs is essentially a small-scale fumarole. CO2, SO2, and H2O are commonly found dissolved in magma and evidence for this is found in gasses effusing out of volcanic vents and in mineral deposits. I'm not sure if we are thinking of the same Soda Springs, but I'm not aware of any CO3 being present, although it isby jgeo - Yosemite and the Sierra Nevada. News & Discussion