Scientists Trace the Grand Canyon’s Missing Billion Years to Deep-Earth Tectonics
A new line of research is offering a plausible explanation for one of geology’s most famous mysteries: the Grand Canyon’s Great Unconformity, a gap in the rock record spanning as much as 1.2 billion years. Scientists say the missing history may have been erased by deep-Earth processes that lifted some continents, buried others, and set the stage for erosion to strip away vast layers of ancient rock.
