Mahogany Mountain
... that eruptions from Mahogany Mountain, a caldera volcano, produced rock formations in Leslie Gulch over 15 million years ago?
... that eruptions from <b id="mwDb4"><a href="./Mahogany_Mountain" id="mwDb8" rel="mw:WikiLink" title="Mahogany Mountain">Mahogany Mountain</a></b>, a <a href="./Caldera" id="mwDcA" rel="mw:WikiLink" title="Caldera">caldera</a> <a href="./Volcano" id="mwDcE" rel="mw:WikiLink" title="Volcano">volcano</a>, produced rock formations in <a href="./Leslie_Gulch" id="mwDcI" rel="mw:WikiLink" title="Leslie Gulch">Leslie Gulch</a> over 15 million years ago?