In 1983 the Minnesota Geological Survey, in conjunction with the Minnesota Department of Natural Resources, Division of Minerals, began a geologic sample program involving the chemical analysis of geological materials, in part submitted by the general public. This Information Circular summarizes the results of that program during the 1985-1987 biennium. In all, 163 samples were analyzed for a variety of minor and trace elements (Tables 1-6); 111 samples were analyzed for major elements as well as minor and trace elements (Tables 7-12). The tables within those categories are organized by the geological age of the materials analyzed.
Morey, G.B.; McDonald, Linda L..
Information Circular 25. Analytical Results of the Public Geologic Sample Program, 1985-1987 Biennium.
Minnesota Geological Survey.
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