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About The daily Nebraskan. ([Lincoln, Neb.) 1901-current | View Entire Issue (Feb. 6, 1981)
page 14 daily nebraskan friday, february 6, 1981 Scotts Bluff sediments filled with volcanic debris By Betsy Miller Even though Scotts Bluff County seems far removed from any sources of volcanic activity, a UNL professor said much of the area is composed of volcanic debris. "A lot of the sediments deposited on the Nebraska plains are extremely rich in volcanic material," said James Swinehart, an assistant professor of geology working with the Nebraska Geological Conservation and Survey division. Swinehart had the opportunity to observe the eruption of Mount St. Helens in Washington last summer. He arrived on the scene just four days after the major explo sion. The volcano was more destructive than first thought because of the tremendous explosions which accompani ed the landslide, Swinehart said. Most geologists knew the volcano would produce the immense mud flow, but they were not expecting the blasts that came vertically and laterally from the cone, he said. According to Swinehart, the blast and its destruction moved at about 200 miles per hour. The force of the blast opened a 200-mile crater at the top, Swinehart said, and triggered the landslide. Botanists who have studied the devastation predict it will take 40 to 50 years to restore a forest, Swinehart said. According to Swinehart, the uranium deposits north west in Nebraska and Wyoming are a result of glass shards that come from volcanic eruptions. He has also observed the sediments near Scotts Bluff County and surrounding areas of western Nebraska and concluded that more than half of them consist of volcanic debris. - - - - c u c i: u g u n C C C C D C C C C C C C G u O C C C C G G D 0 G G C Q C 0 0 C G 0 C G CrCDODOOCC CCGDCDD C r ' n r- i-J Lj U 0 G 0 COC0DDODOOO0OD 0 0 0 OO0OODODOCODOO0DODD0O C LU D 0 C D 0 0 O 0 D 0 0 D 0 0 0 Q C D u G G G G 0 0 G 0 G 0 C G 0 C C 0 0 0 0 D DDODDO or tJia rihrk is ahnut 31 million years old and may have come from an entire system of volcanoes that no longer exist, he said. "There is an incredible volume of material. The geologic factors that brought this about probably don't operate anymore," Swinehart said. The volcanic forces that formed the rocks around Scotts Bluff County were many times stronger than the explosion at Mount St. Helens, Swinehart said. All the volcanic debris may have been deposited in just a few months with continuous spewing, he said. Bangkok flu strain spreads to Cctrtipus Tests at the NU Medical Center have confirmed Influ enza Type A Bangkok has appeared on the UNL campus, said Health Center Director Garland Bare. Bare said six samples were sent for testing and two were found to be of the Bangkok strain. He said he still is waiting for the results of the other tests. Bare said the acutely ill pierod of the flu seems to be lasting only three to five days instead of the seven to 10 days as originally thought. But after the acute illness period, Bare said, patients still are feeling fatigued for about a week. The health center is handling about 20 students a day for flu symptoms, down from 40 to 50 last week. Bare urged students who think they have Bangkok symptoms to visit the health center within the first 48 hours of their illness. After 48 hours, treatment cannot minimize much of the flu's effects, he said. 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