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.org/encyclopedia/canyon

May 20, 2011 ... Weathering and erosion also contribute to the formation of canyons. ... Sometimes, tectonic activity causes an area of the Earth's crust to rise ...

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.

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.scienceabc.com/nature/how-was-the-grand-canyon-formed.html

The Grand Canyon was not formed by a single event in history, but over the ... the artful work that nature performs on the surface of Earth – and even beneath it!

www.scienceclarified.com/landforms/Basins-to-Dunes/Canyon.html

Sudden, tremendous events in Earth's history did not produce these landforms. ... Although perhaps much more slowly, canyons created millions of years ago ...

www.sciencedaily.com/releases/2016/10/161012134133.htm

Oct 12, 2016 ... Geomorphologists who study Earth's surface features and the processes that formed them have long been interested in how floods, in particular ...

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 ...

mysteryscience.com/water/mystery-3/erosion-earth-s-surface-landforms/114

Work of Water Mystery 3. Mystery 3 image. In this Mystery, students use a model of rain and land to explain what causes a canyon to form.