In autumn, David Schueler and his family walked the beach at Harrington Beach State Park on Lake Michigan near Belgium, Wisconsin. They found coal that could have washed up from a sunken schooner years and years ago. David also talks about a special geological feature in Wisconsin, the Niagara Escarpment. A closer look at the wave-tossed coal. Like, comment and share this podcast from Spotting Wisconsin’s Facebook page.