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Copper Mining in North America
From introduction: "In this paper are assembled and summarized many subjects relating to the copper industry in North America. Production of mines and districts, history of the industry in North America. Production of mines and districts, history of the industry, geology, of the principal deposits, and mining methods and costs are discussed."
Date:
1938
Creator:
Gardner, E. D.; Johnson, C. H. & Butler, B. S.
System:
The UNT Digital Library
Preliminary Community and Regional Water Supply Data in Support of Desalting Plant Projects
Purpose and Scope: "The purpose of this study is to provide basic water supply data needed for future evaluation and selection of promising saline water conversion opportunities. This report presents information regarding the present and future supply situation of individual communities. Also presented is information on regional water plans with respect to provisions for municipal water supply."
Date:
April 1970
Creator:
Patterson, W. L. & Lobb, H. J.
System:
The UNT Digital Library
Analyses of Coals in the United States with Descriptions of Mine and Field Samples Collected between July 1, 1904 and June 30, 1910 Part 2. Descriptions of Samples
From Introduction: "This volume contains the descriptions of the samples whose analyses are published in the preceding volume, Part I of this bulletin. The descriptions have been compiled from the notebooks of the persons who collected the samples, have been condensed from accounts given in published reports of the United States Geological Survey, or have furnished by the collection themselves. Inasmuch as the descriptions represent the work of many persons during a period of six years, and inasmuch as they were recorded under widely differing conditions, they necessarily vary in fullness detail."
Date:
1913
Creator:
Lord, N. W.
System:
The UNT Digital Library
Shorter Contributions to General Geology, 1941-42
Preface: The author of this paper gives a thorough description of a complex of very unusual igneous rocks and associated hydrothermal deposits.
Date:
1942
Creator:
Geological Survey (U.S.)
System:
The UNT Digital Library