Mesa Formation: Land or Water in the American Southwest?
If you were flying over a mesa in the southwest region of the US, you would most likely be flying over land. Mesas are flat-topped mountains that are typically found in arid or semi-arid regions. They are formed when a river or stream erodes the softer rock that surrounds a harder rock, leaving the harder rock standing as a mesa. The mesas in the southwest region of the US are typically made of sandstone or limestone.
