Old Faithful

Earth Science Science 1 of 1 appearances
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"Old Faithful" appearances by year

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All Earth Science clues by year

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# Clue Answer As Given Value Round Category Air Date Show
2017 seismography revealed it's a hydrothermal reservoir 200 yards wide that supplies this much-visited U.S. feature Old Faithful $1,200 DJ EARTH SCIENCE 2018-03-14 #7718
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