These layers of sedimentary rock were deposited in Cambrian ... and sponges. Known as the Grand Canyon Supergroup, these layers of rock lie at an angle relative to the layers of rock above.
"The Tonto Group of Grand Canyon holds a treasure trove of sedimentary layers and fossils chronicling the Cambrian Explosion some 500 million years ago," paper author and Utah State University ...
"The Tonto Group of Grand Canyon holds a treasure trove of sedimentary layers and fossils chronicling the Cambrian Explosion ...
The Grand Canyon was carved out of rock by the Colorado River over millions of years. The strata of the canyon is discussed to explain what the layers tell us about how the canyon formed.
Some results have been hidden because they may be inaccessible to you
Show inaccessible results
Feedback