County Geologic Atlas Program


Maps and Studies

Products include maps and interpretive reports of geology, groundwater, pollution sensitivity, and special studies. Many provide separate GIS files and water chemistry information.

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County Geologic Atlas (CGA)

County by county geologic and groundwater information.

Part A: Geologic studies include surficial deposits and bedrock.

Part B: Groundwater studies include flow systems, aquifers, groundwater chemistry, and sensitivity to pollution.

Early atlases were not split into two parts.

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Minnesota Hydrogeology Atlas (MHA)

Extends maps, reports, and data originally published in the CGA program to new statewide coverage.

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Regional Hydrogeologic Assessment (RHA)

Larger areas (typically 4-9 counties) covered in less detail than a County Geologic Atlas.

These older assessments will be replaced by the County Geologic Atlases as they are completed.

Groundwater Provinces

Summary of aquifer and groundwater resource differences at the regional level

Springs and Karst

Spring Inventory, Springshed Mapping, Karst information

Chemistry

Water chemistry information and locations collected by the DNR for county atlas or regional assessment projects

Geophysics

Geographical database of seismic refraction and resistivity imaging data

Special
Projects

Groundwater and the Mt. Simon Aquifer video (2013)

South-Central Minnesota Groundwater Monitoring of the Mt. Simon Aquifer (2013)

Buried Sand and Gravel Aquifers of the Breckenridge/Wahpeton Area (2012)

Hydraulic Impacts of Quarries and Gravel Pits (2005)

Hydrogeology of the Rock River watershed, Minnesota and associated off-channel habitats of theTopeka shiner (2004)