The oldest fossilized vertebrate footprints ever discovered in the Grand Canyon were found embedded in a recently fallen boulder located in plain sight.
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Source : Fallen Boulder at the Grand Canyon Exposes 300-Million-Year-Old Footprints
The oldest fossilized vertebrate footprints ever discovered in the Grand Canyon were found embedded in a recently fallen boulder located in plain sight.
Read more…
Source : Fallen Boulder at the Grand Canyon Exposes 300-Million-Year-Old Footprints
