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  • All fields: Silica
(307 results)



Display: 50

    • Bedrock geologic map of northeastern Itasca County, Minnesota, M-68

    • 1990
    • Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments), northeastern Itasca County, scale 1:48,000. Electronic file available at: ftp://mgssun6.mngs.umn.edu/map_catalog/pdf/umn22462.pdf
    • Minnesota Geological Survey
    • Geologic map of Minnesota, bedrock geology, M-24

    • 1976
    • Interpretations of bedrock geology (distribution of rock at the land surface and beneath surface sediments) of Minnesota, scale 1:1,000,000. Electronic file available at: ftp://mgssun6.mngs.umn.edu/map_catalog/pdf/umn22403.pdf
    • Minnesota Geological Survey
    • Geological Society of Minnesota News, April 1971

    • 1971-04
    • The April 1971 edition of the Geological Society of Minnesota (GSM) newsletter included an updated map of the location of bronze geologic markers, an article on how agates form, and a story on the early history of society.
    • Geological Society of Minnesota
    • Geological Society of Minnesota News, December 1982-February 1983

    • 1982 - 1983
    • The December-January-February 1982-1983 edition of the Geological Society of Minnesota (GSM) newsletter included society news, and a report on the field trip to the Mesabi Range, as well as a Memorial to Ruth Benson.
    • Geological Society of Minnesota
    • Geological Society of Minnesota News, March-April 1972

    • 1972
    • The March-April 1972 edition of the Geological Society of Minnesota (GSM) newsletter included society notices, the President's Letter, and news of the death of Mrs. E.G. Fritter.
    • Geological Society of Minnesota
    • Geological Society of Minnesota News, Volume LXIV, Number 2, Summer 2010

    • 2010
    • The Summer 2010 edition of the Geological Society of Minnesota (GSM) newsletter included several articles and notices, and a description of the 6000-person 2011 Geological Society of America meeting in Minneapolis by Harvey Thorleifson.
    • Geological Society of Minnesota
    • Skillings' Mining Review, Volume VIII, Number 21

    • 1919-10-11
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining and Market Letter, Volume II, Number 48

    • 1914-04-25
    • This issue of Skillings' Mining and Market Letter features proposed federal legislative language concerning the mining of radium ores. This international mining trade publication began as a weekly in Duluth, Minnesota, in 1912, changing its name...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume V, Number 28

    • 1916-12-02
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining and Market Letter, Volume IV, Number 45

    • 1916-04-01
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining and Market Letter, Volume IV, Number 50

    • 1916-05-06
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume 5, Number 9

    • 1916-07-22
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining and Market Letter, Volume IV, Number 28

    • 1915-12-04
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume X, Number 49

    • 1922-04-22
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining and Market Letter, Volume II,  10

    • 1913-08-02
    • This issue of Skillings' Mining and Market Letter, including supplement, features the opening of the Cuyuna-Duluth Mine in Cuyuna, Minnesota. Pictures include the Cuyuna-Duluth, Cuyuna-Mille Lacs, and Pennington Mines, the Messaba-Cuyuna property,...
    • Iron Range Research Center
    • Skillings' Mining and Market Letter, Volume III, Number 11

    • 1914-08-08
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 15

    • 1919-08-30
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume X, Number 28

    • 1921-11-26
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 1

    • 1919-05-24
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 18

    • 1919-09-20
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume X, Number 8

    • 1921-07-09
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VII, Number 50

    • 1919-05-03
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 31

    • 1919-12-20
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume IX, Number 28

    • 1920-11-27
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume X, Number 26

    • 1921-11-12
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 5

    • 1919-06-21
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume IX, Number 34

    • 1921-01-08
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 11

    • 1919-08-02
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume IX, Number 26

    • 1920-11-13
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center
    • Skillings' Mining Review, Volume VIII, Number 8

    • 1919-07-12
    • Skillings' Mining and Market Letter is an international mining trade publication. It began as a weekly publication in Duluth, Minnesota, in 1912. It changed its name to Skillings' Mining Review in July 1916 (dropping the apostrophe in 1993). ...
    • Iron Range Research Center

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