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Show SALT FLAT NEWS JANUARY 1971 10 For that quick patch job Why not order a Cover of ii, StP'" . - ,vi ; - The Salt Flat News (the , If this doesnt satisfy . you-- v ''' b' nu f 'e rrlSr.V- !. ft'" V- thing wiU. '' s'.' ' ' " ' 4 'i j ' ' 1 RUSH ME MY COVER FOR MY WALL KEEPS ON CRUMRUNG 750 each Please send circle one Cover I enclose $ "Did you know that Bank of Salt Lake is open 'til 6 and pays Daily Interest, too?" COVER for COVER 2 1 . covers) . Name.... Address. City State Send to: Zip. THE SALT FLAT NEWS Box 11717 Salt Lake City, Utah GILSON MOUNTAINS THESIS SURJECT Word does get around when you offer something extra. Like staying open each weekday until 6:00 p.m., paying Daily Interest on savings, and providing the kind of Personal Service people in the University community enjoy. Stop in and open your account soon. And spread the word. BANK OF SALT LAKE Near "U" at 260 South 13th East - 487-104- 1 One of the dissertations completed at the University of Utah in 1970 is entitled 'Geological and Geophysical Studies of the Gilson Mountains and Vicnity, Juab County, Utah, by Yun Fei Wang of Taiwan, UGMS was one of the organizations which helped Dr. Wang with field materials. The Gilson Mountains, occupying an area 9 miles long in a northerly direction and 10 miles widej are on the north side of the Leamington Canyon and Sevier River which separates them from the Canyon Range to the south.' They are dominated by lime stone of Mississippian age but, owing to complex structure, both older and younger rocks crop out. In addition- - to the Gilson Mountains, the mapped area in: eludes the Blade Mountains which lie south' of the West Tintic Mountains and the narrow (one mile wide) southern projection of the East Tintic Mountains. The Black Mountains, 6 square miles in area, expose beds of Cambrian to Devonian age; the East Tintic Mountains are dominated ay Pennsylvanian and Permian rocks, though older rocks are brought up in thrust plates. The large intervening areas are covered by Quaternary and Tertiary sediments. Patches of Tertiary volcanic rock mainly of latite composition, are preserved in the East Tintic Mountains and at the nearby east end of the Gilson Mountains. No intrusive rocks are recorded and no metallic mineral occurrences noted, though sand and gravel, limestone and quartzite are abundant. The study is mainly concerned with the stratigraphic sequence of 35,000 feet of sediments ranging from Late Precam-bria- n to Tertiary and with the tectonics exhibited in the Gilson Mountains. Rocks of Triassic and Jurassic age are conspicuously absent and the conglomerate of Cretaceous age which is so prominent in the Canyon Mountains to the south is represented by one small outcrop in Leamington Canyon. . The Leamington Canyon fault along the north side of the canyon brings the Paleozoic rocks in contact with Precambrian quartzite and terminates the thrust plates with the Paleozoic. It has been interpreted as the strike-slimargin of a large regional thrust plate or as a fault having a role of less significance. The Champlin and Gilson thrust faults are interpreted as ' .having been active in the Cretaceous orogeny tending to bring older rocks over younger. . A considerable part of the field effort was devoted to a gravity survey and magnetic profiles in areas of major structural interest. Anomalies were found but their interpretation added little in the way of definite contribution. p |