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Grand Canyon Evolution Research Paper

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Characteristics Contributing on Canyon Evolution

Kelly Neubauer

FTS: Evolution

October 14, 2014 The Grand Canyon is one of the largest canyons on Earth, spanning 277 miles and measuring up to 18 miles wide (National Park Service, 2014). This natural wonder is viewed by millions of tourists every year who come to see the remarkable views (National Park Service, 2014). While its beauty is impressive, so is the story behind the formation and evolution of the canyon. Every canyon in the world has a unique formation based on the geological and environmental changes that occur in the area. While the Grand Canyon grew wider, the Colca Canyon of Peru grew deeper, to a depth twice that of the Grand Canyon (The Summit Post, 2007). By looking …show more content…
The sediments found in the western part of the canyon differ from those of the east, causing different characteristics to be more prominent in each respective area. In the western half, sediments are well exposed and have been studied more than in the east. Through these studies it has been found that there is only a small amount of rocks containing fragments of older rocks (Pelletier, 2009). Instead, the western canyon includes large deposits of basalt and limestone that were deposited there 6 to 12 million years ago (Lee et al., 2013). These rocks do not erode as easily as those in the eastern canyon, which has an incision rate of two to three times higher than the western canyon (Pelletier, 2009). The eastern canyon contains more shale and sandstone, which contain fragments of older rocks which often have experienced damage at the chemical levels, causing the rocks to be easily breakable (Lee et al., 2013). These common sediments explain why the eastern canyon has such a greater incision rate. These different rates cause the canyon to very differently than any other canyon in the …show more content…
After looking at how these canyons have evolved over millions of years, we can easily see how these formations became to be such spectacular sights. Works Cited

BH. How old is the grand canyon. Science. 2007; 318: 1039.

Lee JP, Kelley SA, Pederson JL, Karlstrom KE, Ehlers TA. New thermochronometric constraints on the tertiary landscape evolution of the central and eastern grand canyon Arizona. Geological Society of America: Bulletin. 2013; 9(2): 216-228.

Moores, EM, Vahl FM. The art of geology. Geological Society of America: Abstracts with Program. 1988: 31, 114.

Pelletier, JD. Numerical modeling of the late cenozoic geomorphic evolution of grand canyon, arizona. Geological Society of America: Bulletin. 2010; 595-608.

Thouret JC, Worner G, Gunnell Y, Singer B, Zhang X, Souriot T. Geochronologic and stratigraphic constraints on canyone incision and Miocene uplift of the central andes in peru. Earth and Planetary Science Letters. 2007; 263:151-166.

Nature and science [Internet]. National Park Service (US); 2014. Available from: http://www.nps.gov/grca/naturescience/index.htm

Canon del colca [Internet]. The Summit Post; c 2007. Available from:

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