Mysterious Crack In Michigan Explained As Limestone Bulge

Mysterious Crack In Michigan Explained As Limestone Bulge
The welcome sign for en:Menominee, Michigan, USA. Royalbroil / Flickr CC BY-SA 2.5

On Monday, reporters stated that a mysterious crack found in Michigan five years ago happens to be a limestone bulge. In a forest near Birch Creek on Michigan’s Upper Peninsula, north of Menominee, the upheaved rock and soil was discovered after a distant thunder boom.


The residents stated that the blast shook nearby homes with the strength of a magnitude-1 earthquake on October 4, 2010, at about 8:30 a.m. and a long crack at the top of a narrow ridge was discovered by locals the following day.

According to EurekAlert, researchers from Michigan Technological University led by Wayne Pennington, dean of the College of Engineering at Michigan Tech, think they have identified what the feature is, a geological pop-up. The researchers said that the crack in Michigan is an extraordinary feature as far as they can tell.

As stated by the Discovery, Pennington, senior study author, stated, “It was interesting to see that the crack seemed to ignore the roots.

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“The forces were stronger than the roots.”

Pennington and his co-authors arrived by reasoning in a study published in the journal Seismological Research Letters, saying the explanation (based on a seismic study) for the mysterious crack in Michigan is a pop-up in the upper layers of limestone beneath the clay soil.

Science Daily reports the further explanation of Wayne Pennington as, “One of our reasons for publishing this was that in our search of the literature we could find no other mention of modern pop-ups that didn’t occur at something like the base of a quarry, where people had removed massive amounts of rock earlier.”

Pennington also said that as the team surveyed the site, there are no nearby quarries; however, there was a large tree that had been removed.