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Map showing publication footprint
  • Usage in publication:
    • Devils Island sandstone
  • Modifications:
    • Named
  • Dominant lithology:
    • Sandstone
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Thwaites, F.T., 1912, Sandstones of the Wisconsin coast of Lake Superior: Wisconsin Geological and Natural History Survey Bulletin, no. 25, 117 p.


Summary:

Named as middle formation of Bayfield sandstone group (new). Named for exposures on Devils Island, Ashland Co., northwestern WI. Consists of pink and white, thin bedded, pure quartz sandstone with abundant ripple marks. Thickness is 300 ft. Conformably underlies Chequamegon sandstone (new); overlies Orienta sandstone (new). Age is Precambrian (upper Keweenawan).

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


Map showing publication footprint
  • Usage in publication:
    • Devils Island Formation
  • Modifications:
    • Revised
    • Age modified
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Mudrey, M.G., Jr., and Ostrom, M.E., 1986, Upper Keweenawan stratigraphy, Chapter IV, IN Mudrey, M.G., Jr., ed., Precambrian petroleum potential, Wisconsin and Michigan: Wisconsin Geological and Natural History Survey, Geoscience Wisconsin, v. 11, p. 23-25.


Summary:

Is part of Bayfield group which in turn is assigned to Keweenawan Supergroup. Correlates(?) with Hinckley Formation of MN and Mount Simon Sandstone of southern WI. Age is Middle Proterozoic.

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


Map showing publication footprint
  • Usage in publication:
    • Devils Island Sandstone*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Lake Superior region
Publication:

Morey, G.B., and Van Schmus, W.R., 1988, Correlation of Precambrian rocks of the Lake Superior region, United States, IN Harrison, J.E., and Peterman, Z.E., eds., Correlation of Precambrian rocks of the United States and Mexico: U.S. Geological Survey Professional Paper, 1241-F, p. F1-F31.


Summary:

Is part of Bayfield Group in northwest WI in Lake Superior region. Considered one of youngest Proterozoic sedimentary rocks in Lake Superior region. Is of fluvial and lacustrine origin and is compositionally distinct from underlying Oronto Group. Correlation chart. Normal magnetic polarity. Is considered Middle Proterozoic on basis of relative stratigraphic position, however, has been assigned a Late Proterozoic (King, 1976) or Cambrian (Ostrum, 1967) age.

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


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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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