The consensus among scientists is that the Appalachian Mountains are the oldest mountains in the world. However, there is not absolute certainty.
Scientists point to the crystalline rocks found in the Appalachian Mountains as the primary reason for giving it the title of the oldest. These rocks are between 1.1 billion and 540 million years old. The pressure and heat necessary to create these rocks would have wiped out any primitive life in the area at that time, so these crystalline rocks do not contain any fossils. The time period in which these rocks were formed is known as the Precambrian Era.Learn More
Mountains are natural geographical features and are not built by humans. Mountains are created by the movement and collision of the different plates of the earth's crust. With the help of machines, humans can create large piles of rocks and dirt which could be called mountains in an exaggerated sense, but humans are not able to create full-scale mountains due to their size and the forces they require.Full Answer >
A flat-topped mountain is called a mesa, from the Spanish word for "table." Mesas get their characteristic shape from differential erosion, usually due to running water.Full Answer >
The mountain with the highest elevation above sea level is Mount Everest, with a height of 29,035 feet. However, the mountain with the greatest elevation between its foot and its summit is the island of Mauna Kea in Hawaii.Full Answer >
Interesting facts about the Grand Canyon are that its oldest rocks date back two billion years, it represents one-third of Earth's history and it's not the biggest canyon in the world. The Grand Canyon ranges in age from 250 million years old at the highest rocks to two billion years old at the lowest rocks.Full Answer >