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The Geology of the Grand Canyon

The Geology of the Grand Canyon. Hannah Avery and Sarah Lowe. General Info about the Canyon. Located in Northwestern Arizona Covers 1,218,375 acres of land Deepest point 6,000 feet Widest point 15 miles. How the Canyon Formed. No one knows for sure but… It is believed that…

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The Geology of the Grand Canyon

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  1. The Geology of the Grand Canyon Hannah Avery and Sarah Lowe

  2. General Info about the Canyon • Located in Northwestern Arizona • Covers 1,218,375 acres of land • Deepest point 6,000 feet • Widest point 15 miles

  3. How the Canyon Formed • No one knows for sure but… • It is believed that… • It is a combination of many things • Erosion (By water and ice) • Wind • Colorado River course • Volcanism • Continental Drift • Variations in Earth’s Orbit

  4. Erosion by Water • Located in desert so soil is less absorbent causing flash floods • Flash floods can move automobiles, buses, and small houses • “If automobiles, buses, and small houses are in the way then it will take them too.”

  5. Erosion by Ice • Water seeps into cracks and freezes, the freezing water expands, expanding the cracks. • Expansion causes rocks to be pushed into the canyon causing Rock Falls • Rock Falls often take out hiking trails

  6. Layers of the Grand Canyon

  7. Other Facts • Roots of the ancient mountain range that lies at the base of the canyon was formed approximately 1.7 billion years ago • Climate is considered semi-arid • Colors are due to different amounts of minerals in the rocks

  8. References • http://www2.nature.nps.gov/geology/parks/grca/index.cfm • http://www.kaibab.org/geology/gc_geol.htm#when • http://en.wikipedia.org/wiki/Geology_of_the_Grand_Canyon_area • http://www.pbs.org/wgbh/amex/canyon/sfeature/geology.html

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