| 1. | The associated geothermal energy is used in numerous hydrothermal power plants.
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| 2. | Exceptions include some pit lakes and waters from some hydrothermal springs.
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| 3. | Twelve previously unknown volcanoes and numerous undersea hydrothermal vents were discovered.
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| 4. | It occurs as a secondary mineral in oxidized hydrothermal lead deposits.
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| 5. | It occurs in high temperature hydrothermal deposits and contact metamorphic rocks.
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| 6. | Sulfur deposits generated from hydrothermal alteration are found on Cerro Tuzgle.
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| 7. | It is usually found in low to moderate temperature hydrothermal deposits.
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| 8. | Halloysite typically forms by hydrothermal alteration of alumino-silicate minerals.
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| 9. | It occurs in high temperature hydrothermal deposits with pyrrhotite and chalcopyrite.
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| 10. | Temperatures in the hydrothermal system are estimated to be between and.
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