Bedrock Geology of Michigan 1:500,000-Scale

Basic Information
Author: Michigan Department of Environmental Quality - Geological Survey Division,
Description:Hard copy Michigan Bedrock Geology maps, scale 1" = 5280' (1:63360), were digitized by the Michigan Resource Information System (MIRIS) using Microstation software. These files were cataloged by county then merged into regional files based on State Plane zones. Edge matching took place along county boundaries. Microstation design files were converted to Arc/Info coverages using the IGDS command. Coverages were cleaned and built into polygons. Arc/Info data was cross referenced with original design files using ArcView software, and check plots were produced at a scale of 1:500000. Errors were corrected using ArcTools. Coverages were re-projected to the Michigan Georef coordinate system (Oblique Mercator) using the Arc/Info PROJECT command. All three zonal coverages were combined using the UNION command, then the attribution was combined into the respective common fields. Corrections made along state plane line for zones 2 and 3 in the Lower Peninsula using ArcTools. Michigan statewide bedrock geology maps shapefiles and metadata are publicly available online for download through links provided or through the Michigan Geographic Data Library at
Publication Date:
Author Contact Information
Distributor Contact Information
Name: McDonald, Donald
Organization Name: MDNR Land and Mineral Services Division, Resource Mapping and Aerial Photography Section
Street: P.O. Box 30448
City: Lansing
State: MI
Zip: 48909-7948
Phone: 517-373-2534
Geographic Extent
North Bounding Latitude: 48.27935311
South Bounding Latitude: 41.69331783
East Bounding Longitude: -82.38965295
West Bounding Longitude: -90.38603812