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National Geologic Map Database
Geologic Unit: Hudson
Map showing publication footprint
  • Usage in publication:
    • Hudson Episode
  • Modifications:
    • Original reference
  • AAPG geologic province:
    • Illinois basin
    • Michigan basin
    • Wisconsin arch
Publication:

Hansel, A.K., and Johnson, W.H., 1996, Wedron and Mason Groups; Lithostratigraphic reclassification of deposits of the Wisconsin Episode, Lake Michigan lobe area [Illinois]: Illinois Geological Survey Bulletin, no. 104, 116 p.


Summary:

Pg. 23. Hudson Episode. Material referents are marine and lacustrine sediment deposited in and around what is now Hudson Bay during and since deglaciation. In Illinois, these are modern soil and part of the Cahokia Formation. Represents post-glacial time in regions that were covered or influenced by the Laurentide Ice Sheet.
Named from Hudson Bay, which is located in a central position relative to the Laurentide Ice Sheet.

Source: Publication.


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

Asterisk (*) indicates published by U.S. Geological Survey authors.

"No current usage" (†) implies that a name has been abandoned or has fallen into disuse. Former usage and, if known, replacement name given in parentheses ( ).

Slash (/) indicates name conflicts with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005, 2021). May be explained within brackets ([ ]).

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