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en.wikipedia.org/wiki/Canyon

A canyon or gorge is a deep cleft between escarpments or cliffs resulting from weathering and ... The processes of weathering and erosion will form canyons when the river's headwaters and estuary are at .... the Yarlung Tsangpo River in Tibet, is regarded by some as the deepest canyon in the world at 5,500 m ( 18,000 ft).

www.nationalgeographic.com/science/earth/surface-of-the-earth/canyons

These natural formations are created by rivers running deep within the Earth.

www.nationalgeographic.org/encyclopedia/canyon

May 20, 2011 ... The largest canyon in the solar system isn't found on Earth. ... Weathering and erosion also contribute to the formation of canyons. In winter ...

www.eartheclipse.com/geology/canyon-landform-formation-location-examples-facts.html

A canyon is a deep and narrow valley consisting of steep sides created by weathering and erosion by rivers, wind, rain and tectonic activity.

www.livescience.com/27489-grand-canyon.html

Feb 26, 2013 ... The Grand Canyon is a rich, geologic landscape formed over millions of years by a combination of natural forces. ... Live Science · Planet Earth.

www.livescience.com/8312-canyons-form-quickly-gusher-suggests.html

Jun 20, 2010 ... Some of the most spectacular canyons on Earth and Mars were probably formed in the geologic blink of an eye, suggests a new study that ...

www.bbc.com/news/science-environment-25881953

Jan 26, 2014 ... The world famous Grand Canyon, which snakes through the ... through the deep incision, which records nearly two billion years of Earth history.

phys.org/news/2016-10-canyons-earth-mars.html

Oct 12, 2016 ... A new model of canyon-forming floods from UMass Amherst and CalTech researchers suggests that deep canyons can be formed in bedrock ...

www.umass.edu/newsoffice/article/modeling-floods-formed-canyons-earth-and

Oct 12, 2016 ... Modeling Floods That Formed Canyons on Earth and Mars. UMass Amherst and CalTech study offers new model of megaflood-carved ...