Primary Hot Springs
A primary hot spring is a geothermally heated mineral water, where direct volcanic activity plays a far greater role in the process of the hot springs formation. One of the fundamental physical distinctions between a filtration spring and a primary spring is the mineral and gas content of the water, such as radon and bromide. Primary hot springs are often “powered” by magma chambers which exist miles under the Earth’s surface, as well as in volcanically active regions.