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Information Circulars  [46]

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Information Circular 4. Directory of Minnesota Mineral Producers 1964

Hogberg, R.K. (Minnesota Geological Survey, 1966)
This Information Circular is published by the Minnesota Geological Survey to fulfill a part of its responsibility for providing information on the State's mineral resources. In this directory a mineral producer is defined ...

Information Circular 47. Compositions of Rift-Related Volcanic Rocks of the Keweenawan Supergroup Atop the St. Croix Horst, Southeastern Minnesota

Morey, G.B. (Minnesota Geological Survey, 2001)
This information circular summarizes stratigraphic and geochemical information obtained in the 1980s and early 1990s from Mesoproterozoic volcanic rocks associated with the Midcontinent rift system. These rift-related rocks ...

Information Circular 46. Aggregate Resources Inventory of the Seven-County Metropolitan Area, Minnesota

Southwick, D.L.; Jouseau, M.; Meyer, G.N.; Mossler, J.H.; Wahl, T.E. (Minnesota Geological Survey, 2000)
Construction aggregates are sand, gravel, and crushed rock-bulk granular materials that are used in building and landscaping projects of all sizes and kinds. Most of the highest quality aggregate is used in the manufacture ...

Information Circular 45. Utility of Elemental Geochemical Data in Correlation and provenance Studies of Pleistocene Materials: A Case Study in Stearns county, Central Minnesota

Morey, G.B.; Lively, R.S.; Meyer, Gary N. (Minnesota Geological Survey, 2000)
Geochemical attributes, especially minor, trace, and rare-earth elements, are commonly used to characterize various kinds of sedimentary rocks and to elucidate their provenance. Similar techniques have been applied to ...

Information Circular 44. Geochemical Evaluation of Platinum Group Element (PGE) Mineralization in the Sonju Lake Intrusion, Finland, Minnesota

Miller, James D., Jr. (Minnesota Geological Survey, 1999)
This study was undertaken to evaluate the potential for stratiform platinum group element (PGE) mineralization in the Sonju Lake intrusion (SLI). The SLI is a well differentiated, tholeiitic, mafic layered intrusion that ...

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