Michigan Tech researchers find cause of crack in ground

Associated Press

Menominee — Faculty and student researchers from Michigan Technological University believe they have figured out how a large crack opened in the ground more five years ago near the Michigan-Wisconsin border.

Since the Upper Peninsula isn’t known for its earthquakes, the university’s researchers have been studying the 360-foot long crack in Menominee to determine what caused it in October 2010.

WLUK-TV in Green Bay, Wisconsin, reports that researchers have determined that a geological pop-up occurred when underground pressure on the limestone rock in the area was released, allowing the crack to form.

Michigan Tech dean of engineering Wayne Pennington tells the news station that a geological pop-up is a unique event because it’s usually caused by the removal of a glacier.