Located in Arizona, this huge hole in the ground shows the Earth – right down to the bone.
Erosion takes a long time to turn a desert floor into a Grand Canyon. Some scientists believe it took as long as six million years. Others believe it was much faster, taking only one million years. Either way, it was a long time!
http://www.kidsgeo.com/geology-for-kids/0060-weathering.php


No comments:
Post a Comment