Near that pass is the type section to of Iridium anomaly, a thin ash formation that signifies the end of the dinosaurs. The Cretaceous Mass Extinction
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Near that pass is the type section to of Iridium anomaly, a thin ash formation that signifies the end of the dinosaurs. The Cretaceous Mass Extinction
That makes sense since it is widely thought that the meteor impact in New Mexico is what brought the extinction of the dinosaurs as we know them. And it also helped in the formation of the grand canyon since there was so much "drainage" that led to the erosion of the canyon.