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Geologic Unit: Dahlen
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Map showing publication footprint
  • Usage in publication:
    • Dahlen 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 Dahlen Formation, top formation of Coleharbor Group in report area, overlies the newly named Churchs Ferry Formation of Coleharbor Group. Underlies Oahe Formation. Author states that Hansboro Member is excluded by him from Dahlen. Covers nearly all of Ramsey Co, ND, Williston basin. Areal extent and thickness map. May be more than 40 ft thick. Was deposited during the main late Wisconsinan ice advance.

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


For more information, please contact Nancy Stamm, Geologic Names Committee Secretary.

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