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Please use this identifier to cite or link to this item: http://hdl.handle.net/11299/59313

Title: Information Circular 20. Aggregate Resources Inventory, Twin Cities Metropolitan Area, Minnesota
Authors: Meyer, Gary N.
Jirsa, Mark A.
Keywords: geology
aggregate
Minnesota Geological Survey
resources
Twin Cities
Issue Date: 1984
Publisher: Minnesota Geological Survey
Series/Report no.: Information Circular
20
Abstract: Aggregate is derived from two major sources in the seven-county area. Surficial deposits of sand and gravel, or "natural" aggregate, are the primary source. These are deposits of rock detritus broken down and sorted by the actions of glacial ice and running water. A second and increasingly important source is carbonate (limestone and dolomite) bedrock, which is converted to aggregate by blasting and crushing. Because ongoing urban development both restricts access to sources of aggregate and requires more aggregate for construction, a report was published by the Metropolitan Council of the Twin Cities area as an aid for industrial and governmental planners dealing with the problems of aggregate supply and demand. The plates and Appendix A of that report summarized the data in this information circular.
Description: 16 p., 2 plates. 1, Sand and gravel; 2, Bedrock. Scale 1:250, 000.
URI: http://purl.umn.edu/59313
ISSN: 0544-3105
Appears in Collections:Information Circulars

Files in This Item:

File Description SizeFormat
MGS_IC_20.pdfText419.6 kBPDFView/Open
IC-20_pl1.pdfIC-20 Plate 12.47 MBPDFView/Open
IC-20_pl2.pdfIC-20 Plate 22.56 MBPDFView/Open
IC-20_pl2.pdf2.56 MBPDFView/Open

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