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Geologic Unit: Roubaix
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Map showing publication footprint
  • Usage in publication:
    • Roubaix Formation*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Midcontinent region
Publication:

Bayley, R.W., 1972, Preliminary geologic map of the Nemo district, Black Hills, South Dakota: U.S. Geological Survey Miscellaneous Investigations Series Map, I-712, 1 sheet, scale 1:24,000 [http://ngmdb.usgs.gov/Prodesc/proddesc_9476.htm]


Summary:

Reduced in stratigraphic rank from group to formation. Unconformably? overlies the newly named Reausaw Slate of Windy Flats Group (new) of middle Precambrian age. Unconformably underlies Paleozoic rocks. Type locality stated to be in secs 32 and 33, T4N, R4E, Lawrence Co, SD in the Midcontinent region. Mapped in two large outcrop areas at the southwest and west-central edges of the map in Lawrence and Pennington Cos. Consists chiefly of metagraywacke, schistose graywacke and slate or schist of various kinds. Altered calcareous concretions locally. Of middle Precambrian age.

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


Map showing publication footprint
  • Usage in publication:
    • Roubaix Formation*
  • Modifications:
    • Age modified
  • AAPG geologic province:
    • Midcontinent region
Publication:

DeWitt, Ed, Redden, J.A., Wilson, A.E., and Buscher, David, 1986, Mineral resource potential and geology of the Black Hills National Forest, South Dakota and Wyoming, with a section on salable commodities by J.S. Dersch: U.S. Geological Survey Bulletin, 1580, 135 p., (incl. geologic map, scale 1:250,000)


Summary:

Mapped with Early Proterozoic unit Xgw (Pl. 1) west of Nemo and near Roubaix, Lawrence Co, SD in the Midcontinent region. Geologic map.

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


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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