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THE ASSOCIATION OF PACIFIC COAST GEOGRAPHERS Eighth Annual Meeting. Salt Lake City, Utah, June 17-18, 1942 The eighth annual meeting of the Association was held at the University of Utah, Salt Lake City, on June 17 and 18, 1942, as a part of the program of the twenty-sixth annual meeting of the Pacific Division, American Association for the Advancement of Science, and associated societies. Four halfday sessions for the presentation of papers were held, besides the annual dinner session, at which the address of the retiring president was delivered and the announcement of the results of the election of officers for the year 19421943 was made. Program, With Abstracts of Papers Presented (Papers published in full in the foregoing pages are not abstracted here.) Wednesday Morning Session, June 17: Influence of Geography on Population Trends in Utah. George H. Hansen. Brigham Young University, Provo, Utah. ABSTRACT: Although the population of Utah has increased from 11,380 in 1850 to 550,310 in 1940, all the towns and cities in the state have not shared in this trend. This growth is shared in the main only by towns and counties that have changed from an agricultural to an industrial base. Most agriculture communities in the state reached their peak in growth before or by 1920, many of them back as far as 1900. Certain communities because of geographical advantages have grown into thriving trade centers. Of the 29 counties in Utah, 11 made 20% or more gain from 1920 to 1940, 11 made gains from 0 to 17% and ·ß counties lost in population over the same period: Agriculture counties seem to lose in population during so called "good times" and gain during depression years. Geologic Factors in the Settlement and Development of Utah. Hyrum Schneider, University of Utah. ABSTRACT: Three factors were discussed: (1) Mountains (2) Lake Bonneville (3) Ore Deposits. Mountains were barriers that made it difficult for the pioneers to enter Salt Lake Valley and even at the present time mountains make air transportation more hazardous than over the plains. Mountains made it difficult for the pioneers to enter Salt Lake Valley but without the water supply provided by the mountains Utah could not have been settled. An outstanding example of much heavier precipitation in the mountains than in the adjacent valleys is the difference in precipitation at Salt Lake City at the base of the Wasatch Mountains and at the Silver Lake Station in the mountains less than 25 miles from Salt Lake City. The normal precipitation at Silver Lake is 43 inches a year whereas the normal for Salt Lake City is 16 inches a year. Although this is an extreme case in general precipitation in the valleys is less than 16 inches and in some cases less than 10 inches whereas in the mountains it is generally between 20 and 30. Sixty per cent of the population of Utah gets its water supply from the Wasatch and Uinta Mountains. The increased precipitation in the mountains is not simple orographic precipitation but increased convectional summer rain and greatly increased cyclonic precipitation apparently due to the blocking of cyclonic storms. Deltas and other alluvial deposits formed in Lake Bonneville were important in the initial settlement of Utah because they made it relatively easy for the pioneers to divert water from the streams to irrigate their crops. Without irrigation, agriculture would have failed and without agriculture Utah could not have been settled when it was. 27 28Yearbook of the AssociationVol. 8 Xn later years after agriculture had provided a food supply mining became an important industry. Ore deposits have made Utah one of the most important metal mining states in the Union. In 1940 Utah led all the states in the value of the combined production of gold, silver, copper, lead and zinc. Unfortunately for Utah it was necessary to bring in outside capital to develop her mines. Absentee ownership of many of the mines in the state has not done as much for the development of Utah as resident ownership might have done. Modification of the Early Utah Farm Village. J. A. Geddes, Utah State Agricultural College. Published in full in this issue of the Yearbook...


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