Talk:Colca Canyon

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The article said that Cotahuasi Canyon does not meet the criteria of a canyon. I have lived in the Cotahuasi Canyon now for 6 years and have personally explored it extensively. It does meet the criteria of a canyon, having been eroded from a high alto Plano area of from 4500 to 5000 meters altitude. It is not gorge-like between mountains, but has rather flat surroundings on both sides. The deepest part that I have observed is located on the North side, across from an extinct volcano - Mount Solimana, which is 6093 meters or 19,995 feet. My measurement is from the canyon edge at 5,000 meters down to the Cotahuasi River at 1600 meters, a drop of 3,400 meters. The location for this is near a village called Charcana. I have verified this by topographic map and my own exploration assisted by my GPS. Therefore, I have edited the change in this article. The information about the "canyon" in Tibet is also questionable. The Tibetan feature appears to be more gorge like rather than canyon like, being an eroded feature surrounded by high mountains and not flat surroundings. Therefore, I believe the Cotahuasi canyon should be regarded as the deepest "canyon" in the world. Brad Shaw December, 2006