Definition of hydrothermal
: of or relating to hot water
—used especially of the formation of minerals by hot solutions rising from a cooling magma
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Cassini showed that this ocean contains hydrothermal sites which could provide chemical energy, and that there are organic molecules in it.
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Elsewhere in Italy, some passengers soaked in local culture while enjoying hydrothermal treatments in centuries-old papal baths outside of Rome.
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There is significant evidence that these concentrations of hydrothermal activity did exist at one point on ancient Mars.
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The whole area seethes with hydrothermal activity: Sulfuric acid spews from active fumaroles; geysers spout water and steam; the ground froths with boiling mud; and earthquake swarms shudder through the region, 125 miles south of Rome.
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And there’s no sign of hydrothermal reactions with other minerals that can produce graphite, which is the next most likely source of nonbiological graphite like this.
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The whole area seethes with hydrothermal activity: Sulfuric acid spews from active fumaroles
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Volcanic rocks give up their lithium as rainwater or hot hydrothermal water leaches it out of them.
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Ocean engineer and National Geographic explorer Brennan Phillips led a team to the remote Solomon Islands in search of hydrothermal activity.
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