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Browsing by Subject "northwestern Minnesota"

Now showing 1 - 3 of 3
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    Best management practices for Nitrogen use in northwestern Minnesota
    (University of Minnesota Extension, 2008) Sims, Albert; Rehm, George; Lamb, John
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    Bulletin No. 22. The Geology and Water Resources of Northwestern Minnesota
    (Minnesota Geological Survey, 1932) Allison, Ira S.
    This bulletin presents the results of an investigation of the geology and water supply of northwestern Minnesota. The area treated, as shown in Figure 1, page 2, comprises parts or all of twenty-six counties, for the most part west and north of St. Cloud; it includes about 28,725 square miles, or approximately one-third of the state. Field work was begun in 1924 and continued through three successive field seasons. The writer was assisted in the field during the entire season of 1924 by Mr. W. A. P. Graham, and for several weeks each by Messrs. G. A. Thiel and Francis Pettijohn. Subsequent field work was conducted by the writer alone. The field study consisted of inspection of wells, examination of materials from wells, collection of samples of water for analysis in the laboratory, interrogating well drillers, and gathering well logs and information regarding subsurface conditions. Samples of water for analysis were forwarded in glass-stoppered bottles of two-liter capacity to the laboratory at the University of Minnesota in Minneapolis, where the analyses were made immediately. All the analyses were made under uniform con- ditions by Dr. R. J. Leonard, of whose work the author wishes to express his appreciation.
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    Information Circular 40. Scientific and Exploration Drilling in Northwestern Minnesota
    (Minnesota Geological Survey, 1993) Jirsa, Mark A.; Boerboom, Terrence J.
    Scientific test drilling in northwestern Minnesota was undertaken by the Minnesota Geological Survey (MGS) primarily to elucidate the geology of Precambrian and Phanerozoic bedrock in this area where the bedrock is buried beneath several hundred feet of Quaternary glacial sediment. The results of this drilling of 23 holes, and of selected logging, and analyses of the approximately 80 archived records and core from previous drilling, are presented in this report. These data, in conjunction with various geophysical maps, were utilized by the authors and others to construct a series of new geologic maps of northwestern Minnesota that are part of MGS Open-File Report 93- lA (Jirsa and others, 1993). Parts of that report will soon be published in the MGS Miscellaneous Map Series. An important secondary objective of this project is to describe the Quaternary deposits that overlie bedrock, though no systematic regional interpretation of those deposits has been undertaken to date. This is the seventh information circular since 1980 to report the results of test drilling by the Minnesota Geological Survey. Figure 1 shows the areas covered by those earlier studies in relation to this study area in northwestern Minnesota.