Geologists Look Deep in the Past for the Origins of the Grand CanyonThe Earth Site
For a long time, geologists believed that volcanic activity and earthquakes were the main forces that shaped the surface of the earth. However, this theory was challenged when geologist John Newberry arrived at the Grand Canyon in 1858. Newberry concluded that the Grand Canyon had been created not by volcanic activity, but by the eroding effect of the Colorado River as it cut its path through the Colorado plateau over millions of years. This theory led to a radical reassessment of the age of the earth as well.
For ages, the Grand Canyon National Park has been home to several species of plants and animals, many of which are now under threat from a uranium rush just outside its boundaries. Sign this petition opposing uranium mining plans in or around the Grand Canyon.