How Are Travertine or Silica Deposits Formed from Boiling Geysers

question 3

Multiple Choice

How are travertine or silica deposits formed from boiling geysers and related hydrothermal systems?

• A)Boiling off steam forces the remaining hot solution to be saturated or supersaturated as the same mineral content is now concentrated in less water and it precipitates.
• B)More gases enter the system once boiling starts forcing precipitation.
• C)As pressures increase less mineral matter is soluble.
• D)By introduction of cold fresh recharge water which quenches the system.

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