Jackson Mine
... that the first iron mine in the Lake Superior region, the Jackson Mine, was established where iron ore was found in the roots of a fallen tree?
... that the first iron mine in the <a href="./Lake_Superior" id="mwEcM" rel="mw:WikiLink" title="Lake Superior">Lake Superior</a> region, the <b id="mwEcQ"><a href="./Jackson_Mine" id="mwEcU" rel="mw:WikiLink" title="Jackson Mine">Jackson Mine</a></b>, was established where <a href="./Iron_ore" id="mwEcY" rel="mw:WikiLink" title="Iron ore">iron ore</a> was found in the roots of a fallen tree?