A lost mega-cliff may explain the Grand Canyon’s missing billion years
محرر واقع مصر
ساينس ديلي - أفضل العلوم
21 أغسطس, 2026
A colossal cliff system created as the supercontinent Rodinia broke apart may have exposed the heart of the Grand Canyon nearly a billion years before the Colorado River carved it. The ancient landscape could also help explain why enormous sections of North America’s geological record appear to be missing.
