A recent study places the origins of the canyon beginning some 17 million years ago.
Grand Canyon NP, Arizona.
http://twitpic.com/1a8ilj
© Alena Romanenko.
Аўтар: Alёna Romanenko, фатограф. Пейзажы: usa, arizona, grand. Canon EOS 400D DIGITAL, апублікавана 22.04.2010.