County Geologic Atlas Program

county locator map

Printed atlases available through MGS

Regional Hydrogeologic Assessment: Southern Red River Valley

Number: RHA-3

Included Counties: Clay, Norman, and Wilkin
Parts of: Becker, Grant, Mahnomen, Otter Tail, Stevens, and Traverse

Published in two parts:


Part A - Geology

Date: 1995

Scale: 1:200,000

Publisher: Minnesota Geological Survey (MGS  external link)

Contents (PDF and GIS filesexternal link):

  • Plate 1 - Surficial geology
  • Plate 2 - Quaternary stratigraphy


Part B - Hydrogeology

Date: 2000

Scale: 1:200,000

Publisher: Minnesota Department of Natural Resources, Ecological and Water Resources Division


  • Plate 3 PDF icon. - Surficial hydrogeology (1.3 MB)
  • Plate 4 PDF icon. - Sensitivity of surficial aquifers to pollution (1.8 MB)
  • GIS files