"The Colorado River did not form the Grand Canyon. The Grand Canyon was formed as the flood went down."
What the evidence says
The Grand Canyon's rock layers span nearly 2 billion years of Earth history, and the canyon itself was carved over 5 to 6 million years by the Colorado River. Multiple independent dating methods, distinct fossil assemblages in each layer, and ongoing measurable erosion rates all contradict the claim of rapid formation by a single flood event.
In Part 6 of his Creation Seminar series, Hovind claims the Grand Canyon was carved in “a couple of weeks” by the receding floodwaters of Noah’s Flood. He also asks why scientists don’t explain how the river could flow “uphill” since the top of the canyon is 4,000 feet higher than where the river enters. Both claims reflect fundamental misunderstandings of geology.
The rock layers span nearly 2 billion years: The oldest rocks at the bottom of the Grand Canyon — the Vishnu Basement Rocks — are approximately 1.7 billion years old. The youngest layer at the rim, the Kaibab Limestone, is roughly 270 million years old. These layers were deposited incrementally over vast timescales, each containing distinct fossil assemblages corresponding to different geological eras.
The canyon was carved over 5–6 million years: Research by Karlstrom et al. (2014) in Nature Geoscience used apatite fission-track and uranium-thorium-helium dating to show the Colorado River integrated through older palaeocanyons beginning 5 to 6 million years ago. Some segments of the canyon system date back 50 to 70 million years.
The “uphill river” argument is fallacious: The Colorado Plateau was uplifted by tectonic forces 70 to 30 million years ago. The Colorado River maintained its course as the land rose beneath it — a well-documented geological process called superimposition. The river did not need to flow uphill; the land rose around it.
A single flood cannot explain the evidence: The canyon contains multiple unconformities — gaps in the rock record representing millions of years of erosion between depositional periods. A single catastrophic flood would produce a single, unsorted layer of sediment, not the dozens of distinct, well-ordered layers observed. The National Park Service describes the formation process as deposition, uplift, downcutting, and erosion — each operating over millions of years.
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