Grand Canyon’s origin dated to 6 million years ago
![](https://i0.wp.com/www.sciencenews.org/wp-content/uploads/2014/01/CapeSolitude_Grand_Canyon_free.jpg?fit=860%2C460&ssl=1)
Marble Canyon, shown, was carved into the larger Grand Canyon in the last 6 million years. It was the linking of smaller canyons like this one roughly 5 to 6 million years ago that formed the grand chasm similar to what is seen today, new rock-dating data suggest.
Laura Crossey/Univ. of New Mexico