Today the area around Moenave, Arizona in the Navajo Nation is a dusty, windswept expanse with breathtaking desert landscapes but not a tree or drop of water in sight. About 200 million years ago, however, the area was a marshy riverbed that preserved hundreds of footprints from the dinosaurs that trod across it. The preserved tracks are from the early Jurassic period. Geologists visiting the site hypothesized that there was likely shallow water flowing over the area when the tracks were made. Some event, possibly a mudslide, quickly buried the…
