Was the Grand Canyon created by flood?

Could the origins of the Grand Canyon lie in an enormous flood? The answer is no, says geologist Bill Dickinson, an emeritus professor of geology at the University of Arizona in Tucson.



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Uplift of the Colorado Plateau was a key step in the eventual formation of Grand Canyon. The action of plate tectonics lifted the rocks high and flat, creating a plateau through which the Colorado River could cut down. The way in which the uplift of the Colorado Plateau occurred is puzzling.

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Regardless of the source, we know that it was flooding by water, and not erosion by glaciers, that created the canyon because of the feature's V-like shape (glacial canyons have U-like shapes).

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Over a billion years ago, what is now the Grand Canyon was underwater. It was covered by an ancient ocean that was home to numerous prehistoric animals. Tiny pieces of rocks and soil called sediment were deposited in layers, along with volcanic rocks.

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This natural landmark formed about five to six million years as erosion from the Colorado River cut a deep channel through layers of rock. The Grand Canyon contains some of the oldest exposed rock on Earth. The mile-high walls reveal a cross section of Earth's crust going back nearly two billion years.

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This natural landmark formed about five to six million years as erosion from the Colorado River cut a deep channel through layers of rock. The Grand Canyon contains some of the oldest exposed rock on Earth. The mile-high walls reveal a cross section of Earth's crust going back nearly two billion years.

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Precipitation falling on the Coconino (South Rim) and Kaibab (North Rim) Plateaus creates Grand Canyon's only native waters - waters derived in place - as they percolate through porous, faulted, and fractured rock units to discharge later as springs and seeps below the canyon's rim.

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Over the centuries, the rocks, dirt and silt the Colorado brought down from the Grand Canyon and the rest of its vast drainage basin either settled on what are now the banks of the river or formed an immense delta at its mouth.

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Impress Your Friends With These Fun Facts!*
  • We don't really know how old it is. ...
  • Grand Canyon creates its own weather! ...
  • There are no dinosaur bones in the canyon. ...
  • But there are lots of other fossils in the area. ...
  • There's a town down in the canyon. ...
  • We're missing 950 million years worth of rocks!


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The deepest part of the Grand Canyon is 6,000 feet (1,829 meters). The average depth is 1 mile or 5,280 feet (1,609 meters). At the suspension bridge this canyon is 1,053 feet (321 meters) deep. At Artist Point Overlook the canyon is 1,200 feet (366 meters) deep.

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One of the Seven Wonders of the World, the Grand Canyon is an unbelievable spectacle of nature. It is a great, huge slash in the surface of the earth - 217 miles long, 4 to 18 miles wide and a mile deep, with the Colorado River flowing at the bottom.

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Knowledge of all water sources within Grand Canyon is incomplete. A partial inventory was done in 1979 over a 1,881 square mile area of the park which found 57 perennial water sources, 21 of which are streams and 36 which are seeps.

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