Amid the sometimes-wild temperature swings in Minnesota, from hot summer days to frigid winter nights — conditions are a lot more stable just beneath our feet.
Anywhere in southern Minnesota, it’s long been understood that groundwater temperatures will be a consistent 45 or 46 degrees.
But a Minnesota geologist says he’s found an anomaly underneath Minneapolis. Greg Brick has measured water in caves and flowing from springs that’s more than 10 degrees higher than he expected. He’s concerned that it could cause problems for aquatic ecosystems and drinking water systems above ground — and he’s also concerned that there isn’t enough research to know exactly what those problems could be…