Most Hot Springs That Are Just a Little Warmer Than

question 56

Multiple Choice

Most hot springs that are just a little warmer than mean annual temperature (6°-9°C) acquire their heat ________.

• A)because most of the recharge from rainfall is in the warmer summer months
• B)because most of the groundwater is millions of years old from when the Earth's climate was warmer
• C)by deep circulation through progressively warmer rocks at depth (~2°C per 100 metres)
• D)because there are young intrusions everywhere at depth, always warming up the crust

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