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Please use this identifier to cite or link to this item: http://hdl.handle.net/11299/101466

Title: S-21 Geologic Map of Minnesota-Bedrock Geology
Authors: Jirsa, Mark A.
Boerboom, Terrence J.
Chandler, V.W.
Mossler, John H.
Runkel, Anthony C.
Setterholm, Dale R.
Keywords: bedrock
Issue Date: 2011
Publisher: Minnesota Geological Survey
Series/Report no.: State Map Series
Abstract: This map is a new construct that incorporates existing geologic maps where prior mappers had adequate ground control, and new interpretations based on drill hole, geophysical, and unpublished data where they did not. The interpretation differs significantly from previous maps to reflect new data and accommodate scale. It portrays our current geologic understanding of the temporal and geographic distribution of units within major Precambrian terranes and of the Phanerozoic strata. The western part of the mapped Precambrian terrane is inferred largely from geophysical maps, anchored locally by drilling. In many places, contacts are drawn between units of the same or similar apparent rock type (and same unit label); these are recognized as geometrically distinct, though geophysically or lithologically similar. Digital files corresponding to this map allow removal of Cretaceous, Paleozoic, and some parts of Mesoproterozoic strata to reveal an interpretation of the underlying Precambrian bedrock.
Description: scale 1:500,000
URI: http://purl.umn.edu/101466
Appears in Collections:State Map Series

Files in This Item:

File Description SizeFormat
S21.zipSupplementary Digital, and GIS Files33.33 MBzipView/Open
S21_map.pdfS21 Map PDF image10.62 MBPDFView/Open
S21_text.pdfMap legend file and figures924.29 kBPDFView/Open
S21_readme.pdfExplanation19.35 kBPDFView/Open

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