(Radio Iowa) – Marion County is hoping borings taken by the state Ag Department will help them figure out what caused a big sinkhole there. Public information officer, Emily Feagins, says the borings could give a little bit more information about how far the borings went down into the ground, and what they are pulling up that they can’t see. She says there are three theories about the cause — it’s either natural, coal, or lime related.

The last measurements taken show the sinkhole had grown to roughly 35 to 40 feet in diameter and 20 feet deep. The Marion County Sheriff is asking for people to stay away from the area. Feagins says she understands why people are interested — they just don’t want anyone getting hurt. (click on the image to enlarge)

Photo courtesy Marion-County EMS