It sure looks like it. A jogger spotted the bone near Pier Cove off Lakeshore drive just south of Douglas. It was handed over to the State Police who are doing a forensic examination.
If it is a jawbone, where did it come from?
On theory is this. On July 12th the body of a Chicago man washed up on the beach not far away. As gruesome as it sounds, he'd been in the water quite a while and his body may have been breaking up.
State Police examiners should be able to tell before much longer.