Browsing by Author "Minnesota Geological Survey"
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Item A report of the test drilling results and subsurface geologic conditions at the Sibley County site (best hydrogeology statewide, four preliminary candidate areas), for hazardous waste disposal, Appendix B(Minnesota Geological Survey, 1982) Minnesota Geological SurveyItem Rock Properties Database, updated 2021: Density, Magnetic Susceptibility, and Natural Remanent Magnetization of Rocks in Minnesota(2015-11-19) Chandler, V.W; Lively, R.S; mgs@umn.edu; Minnesota Geological Survey; Minnesota Geological SurveyGeologic interpretation of gravity and magnetic anomaly data in a given area is greatly enhanced if density, magnetic susceptibility (MS) and natural remanent magnetization (NRM) data are available for representative rock-types (Chandler and others, 2008). Along with geologic information from outcrop and drill-holes, rock property data help relate geophysical anomaly signatures to probable rock types, and provide constraints on the use of anomaly data as a tool for mapping and for modeling geology at depth. Rock property data are particularly important to Minnesota where Precambrian rocks, which comprise the bulk of the bedrock surface, are associated with a wide range of density, MS and NRM values and are mostly under a thick cover of unconsolidated glacial sediments.