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The Colorado Plateau
Writer/Researcher: Adam Couto Editor: Brian Melloni Web Page Builder: Adam Couto
The Colorado Plateau holds a kind of magic for geologists. This 130,000 square mile piece of Earth's crust has rock layers that have remained virtually unchanged in at least 500 million years. There has been recent uplift and erosion, but no change in the elevation is made because they counter act each other. this land provides an ideal tool for geologists because the sediments are so clearly defined and there is so much diversity in the evidence left from geological history. For example, there have been bones discovered from about 300 dinosaurs that represent 10 different species. There has also been evidence of evolution found between single-celled life and dinosaurs.
The fact that this geology has remained unchanged is especially impressive considering its surrounding environment. To the East the Rocky Mountains were formed through gradual plate transgression. On the West side, basin and range formations formed by plate tectonics. The volcanic activity around the plateau had virtually left geology unchanged. This is largely due to the extensive sedimentary rock layers that are several miles thick. These layers were formed from piles of sediment that built pressure upon itself and formed a think layer of rock.
The Colorado Plateau is also unique, and provides complex evidence of nature's history. This is do to its fantastic geology. The animal and plant life on the plateau also represent the history of the region. The unchanging geology allows animals to lie dormant in dry potholes for up to 25 years, waiting for the rain to come. There are trees and plants that grow on the cliffs of the plateau that are 1,000 years old. Presently 80 different species of fish and 340 species of plants, including 80 species that are protected as threatened or endangered, are also found in this eclectic environment. Evidence also existst of 12,000 years of human occupation from groups such as the Anasazi who mysteriously disappeared over 700 years ago. It's because of this unique geology that all this evidence is so well preserved and so easy to study.
REFERENCES
http://www.cpluhna.nau.edu
http://www.suwa.org/WATE/cpintro.html#o1
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