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Geotechnical Egineering News tagged with [fossil footprints]

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Fox News   22 August 2020   USA   Grand Canyon, Arizona  
<p>Fossil footprints from 313 million years ago are the oldest to ever be found in the Grand Canyon.<br />A geology professor from Norway, Allan Krill, made the surprising discovery four years ago on a hike with students.<br />Lying next to the trail, in plain ...