<p>Looking at columns in basalt at the bottom where it has broken off</p>
<p>Columnar basalt wall near Tower Fall</p>
<ul><li>Keywords: tower; tower fall; ynp; yellowstone; yellowstone national park; columnar basalt; geology; igneous; volcanic overhanging cliff; 20180610-jwf-2434</li></ul>
Jacob W. Frank
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