- from Grand Canyon
The rocky walls of the Grand Canyon look like a box of melted crayons.
They have layers of red, pink, purple, brown, green, gray, and yellow. No huge cranes, noisy drills, or giant shovels dug the canyon. It was created by the mighty Colorado River. Of course, the river had help from small streams and tributaries, plus wind, rain, snow, and ice. The Earth’s moving tectonic plates also helped.
The canyon is a slow and steady work in progress. Its development began more than 6 million years ago and continues to this day.