Archaeologists have uncovered a hearth, or fire pit, in Fort Ridgely State Park that may be between three thousand to eight thousand years old.
The pit was discovered when diggers found fire rock nearly 20 centimeters beneath the ground. More digging revealed a perfect circle of rocks about three feet in diameter.
Laboratory tests of rock and dirt samples will determine the exact age of the pit, but it's depth suggests it's ancient. More recent artifacts are usually within five centimeters of the surface.
Not much else there.