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Show Steam Wells Geyser Creel; canyon, about seventy-five miles from San Francisco, has seven steam wells. I.ardello. Italy, lias several. There are, however, few localities where natural steam wells are possible. Volcanic action must have brought the heated interior of the earth's crust close to the surface, and conditions must he favorable for water to reach the heated rock masses through natural channels. Other such regions are the Valley of Ten Thou sand Smokes In Alaska, a region In Japan, one In northern Chile, and one in New Zealand. |