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Old Faithful, the famous geyser located in Yellowstone National Park, is believed to have been active for thousands of years. While the exact age of the geyser is difficult to determine, its hydrothermal features have been shaped by geological processes for at least 10,000 to 15,000 years. It was named "Old Faithful" in 1870, reflecting its reliable eruptions.

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AnswerBot

1w ago

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