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Geologic Unit: Gardar
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Map showing publication footprint
  • Usage in publication:
    • Gardar Formation
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Williston basin
Publication:

Hobbs, H.C., and Bluemle, J.P., 1987, Geology of Ramsey County, North Dakota: North Dakota Geological Survey Bulletin, no. 71, pt. 1., Also issued as North Dakota State Water Commission County Groundwater Studies, no. 26, pt. 1, 1987


Summary:

Revised in that Gardar Formation of Coleharbor Group locally overlies the newly named Churchs Ferry Formation of the Coleharbor Group. Underlies Dahlen Formation of Coleharbor. Does not have as large (81) percentage of shale in Ramsey Co as it does (95) in eastern Cavalier Co, ND. Is widespread in northeastern two-thirds of Ramsey Co. Generally 30+/-ft thick; maximum thickness of 200 ft. Occurs as valley fill. Probably deposited after a period of erosion between glaciations. Of Pleistocene age. Geologic maps; cross sections.

Source: GNU records (USGS DDS-6; Denver GNULEX).


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