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Show StatesmanCampus News Page 12 Monday, March 1, 2010 Grand Canyon eroding more slowly than outskirts By CATHERINE MEIDELL assistant news editor The geological analyzation of the Colorado Plateau and Grand Canyon offered the audience of Friday's Science Unwrapped presentation a better understanding of these landscapes' origins. Geology associate professor Joel Pederson expounded upon the evidence geologists have found that the outskirts of the Grand Canyon are eroding more quickly than the Grand Canyon itself. "It's opposite of what I thought," said Kristen Jacobsen, freshman in mechanical engineering, after Pederson spoke. "It doesn't seem like the Grand Canyon would be eroding slowly. I didn't see that coming." Southeastern Utah is where most of the eroding is happening, Pederson said, and Moab, one of the region's most prolific landscape sites is "the most famous erosional landscape in the solar system." Some of Moab's erosion landforms include Corona Arch and the pedestal rocks in Goblin Valley. Pederson said a lot of geological studies were birthed in the Southeastern part of Utah, and USU geologists are lucky to be able to take a piece of the action. Pederson then explained erosion, or canyon-cutting, is done through two ingredients. He related canyons to cake and said there needs to be a knife to cut the canyon and a force moving the knife. The knife represents the Colorado River system, which was formed 6 million years ago. The force, or uplift, can be one of five or more mechanisms, Pederson said. "The professors do a good job of helping people like us understand the concepts," said Taylor Peterson, freshman in mechanical engineering. In the past 10 years, there Super Crossword Answers BOOM ROOM MMMOUO MOM EMOME BOOM MOOD= UMO OMOOMMOODOOMMUMMO MOO MOMMOM OMMOM MOOG OMO MOM BOMB OOM MOMMO QOM DOOMM OOMOOMO OMMOMOMOMOMOM OMMOO MOM MUM MOMS =MEMO DODO M1100 MOOD ODOM DODO MOM DUD MMOBBBOOM MOMO MOM OBO MOO WOMB HOMO HOBO MOM MBOMOU OOMOM MOOD MOO MEMO MOMOMMOMOMMOMOMMOOMMO MOOMM MMO DOOM MOM COMM MOO MOM OMMO =MOM MUMOMM MOM MOMOOMOMMOMMOOMM OMB MOO= MOO OMMOD MOO OMM000 DOOM BOOM As a Public Service to ache Valley COLD SORE Laser therap y' SIMON DAVIES CATCHES THE EARTH in order to answer an Earth ball question at Science Unwrapped Friday. Associate professor Joel Pederson discussed erosion and the Grand Canyon. CARL WILSON photo flexural uplift in response," Pederson said. "This is an example of a positive feedback in science." After the presentation there were many activities in the Geology Building and Eccles Science Learning Center that attendees could participate in and observe. Some of the event's participators brought their own rock collections in order to identify the names of the rocks with geologist professors and students. There was also a demonstration on how to use a Schmidt hammer, a geological data-collection instrument that measures the elasticity of concrete and rock. Activities, such as a geology coloring book and arch-formation picture search, for younger children were available. Students from InTech Collegiate High School, a high school affiliated with USU, received extra credit for attending Science Unwrapped and writing an essay about their findings afterward. "I thought luminescence dating was really interesting and how the researchers were able to figure all of that out," said Jonathon Dursteler, a 14year-old InTech student. Another booth was set up called "Pangaea Puzzles," and geology student Mike Wyatt explained to those who stopped by that plate tectonics are still affecting the location of Earth's continents today. Pangaea is believed to be the super continent that existed on Earth approximately 200 million years ago. Due to plate tectonics, Pangaea was separated into the current continents. Wyatt said researchers discovered North America is still moving two centimeters west every year. "We have an amazing planet," Wyatt said. "All of these things take so long to do, and we are so blessed to be able to see the results today." - catherine.meidell@aggiemail. usu.edu Get your FREE 10 minute cold sore treatment when you feel the cold sore tingle. Take care of it BEFORE it surfaces! ClassifiedAdS Utah State University • ogan, Utah • www.aggietownsquare.com Pleaser note Additional offers include: Look for contact information that may be missing by consulting the complete list of online classifieds at www.ab-bay-usu.com 10% off all services if you are uninsured. FREE missionary exam with paid x-rays and cleaning. For rent Brooklane Apartments For Rent. Only $475 for summer contract. 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He said like dirt, "all of us have radiation buzzing through our bodies." When radioactivity takes place among the dirt granules, electrons are accumulated and a luminescence comes off the granules. The lab equipment measures the light bouncing off the individual grains. Pederson said by carrying out this process geologists are reconstructing the geological history of a river. Geologists also study the steepness slant of rivers when explaining erosion because steepness often shows how much energy the river is expending. However, the Colorado Plateau is opposite, Pederson said. The Grand Canyon is eroding the most in areas where the Colorado River is flat, he said, and this is a mystery that he and many other geologists are itching to solve. With all the data that have been collected studying the Colorado Plateau, geologists have established that a "fast incision plus broad, deep erosion of weak rock inspires Looking for a job? Thinking about looking for a job? 753-7227. 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