After some wells had been drilled, parts of town have been lifted up a bit, causing structural damage to more than 100 buildings in those parts of town -- the images look pretty dramatic. It seems that an anhydrite layer was connected to a water supply - ground water - turning the anhydrite into gypsum, which is a bit larger.
As far as I understand, this could have been prevented if people had listened to the geologists who were screaming "not here" when the drilling was started. Other drilling techniques might also have prevented the problem.
But I suspect this only means we that should think hard about where to build geothermal power plants, not that it's impossible or unprofitable to do so.
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