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National Geologic Map Database
Geologic Unit: Bad Axe
Map showing publication footprint
  • Usage in publication:
    • Bad Axe member
  • Modifications:
    • Original reference
  • Dominant lithology:
    • Greensand
    • Siltstone
  • AAPG geologic province:
    • Sioux uplift
Publication:

Trowbridge, A.C., 1935, [Road logs and stratigraphic sections], IN Kay, G.F., and Trowbridge, A.C., Conference leaders, Upper Mississippi Valley, Iowa City, Iowa, to Duluth, Minnesota: Kansas Geological Society Guidebook for the Annual Field Conference, August 25-September 1, 1935, no. 9, p. 1-236, 423-471., Prepared in cooperation with Iowa, Illinois, Wisconsin, and Minnesota geol. surveys


Summary:

Figs. 1, 2, p. 81, 92, 134, 140, 159, 431, 446, 449, etc. Bad Axe member of Franconia formation. Greensand and siltstone, 21 to 25+/- feet thick, underlying St. Lawrence member of Trempealeau formation and overlying Hudson member of Franconia formation at Victory, Trempealeau Mountain, Skillet Falls, Goodenough Hill, Hudson, Afton, and other places in western Wisconsin. Named from Bad Axe River, near Franconia, Chisago Co., southeastern MN. Age is Late Cambrian.
[On p. 309 of this book G.O. Raasch stated that Bad Axe member is lower DIKELOCEPHALUS zone. St. Lawrence member as used in above definition of Bad Axe member included not only St. Lawrence limestone (dolomite) member of Ulrich but the underlying basal greensand and conglomerate member as well.]

Source: US geologic names lexicon (USGS Bull. 896, p. 99).


Map showing publication footprint
  • Usage in publication:
    • Bad Axe member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Wilmarth, M.G., 1936, [Selected Geologic Names Committee remarks (ca. 1936) on Cambrian and Ordovician rocks of the U.S.], IN Wilmarth, M.G., 1938, Lexicon of geologic names of the United States (including Alaska): U.S. Geological Survey Bulletin, 896, pts. 1-2, 2396 p.


Summary:

Bad Axe member of Franconia sandstone. Present in western Wisconsin and southeastern Minnesota. Above definition [Trowbridge, 1935] was repeated and somewhat amplified by W.H. Twenhofel, G.O. Raasch, and F.T. Thwaites, Nov. 30, 1935 (GSA Bull., v. 46, no. 11, p. 1702, etc.), who, however, treated the basal conglomerate and greensand member overlying Bad Axe member as distinct from their St. Lawrence dolomite member. They gave thickness of Bad Axe member as ranging between 20 and 50 feet. Age is Late Cambrian.

Source: US geologic names lexicon (USGS Bull. 896, p. 99).


Map showing publication footprint
  • Usage in publication:
    • Bad Axe member
  • Modifications:
    • Contact revised
  • AAPG geologic province:
    • Sioux uplift
    • Iowa shelf
Publication:

Stauffer, C.R., Schwartz, G.M., and Thiel, G.A., 1939, Saint Croixian classification of Minnesota: Geological Society of America Bulletin, v. 50, no. 8, p. 1227-1243.


Summary:

Pg. 1238 (table 2), 1239; C.R. Stauffer and G.A. Thiel, 1941, Minnesota Geol. Survey Bull., no. 29, p. 30, 40-41, measured section. Bad Axe member of Franconia formation. In Minnesota, underlies Nicollet Creek member (new) of St. Lawrence formation. Age is Late Cambrian (St. Croixan).

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 189).


Map showing publication footprint
  • Usage in publication:
    • Bad Axe member
  • Modifications:
    • Contact revised
    • Biostratigraphic dating
  • AAPG geologic province:
    • Wisconsin arch
Publication:

Raasch, G.O., 1951, Revision of Croixan Dikelocephalids: Illinois Academy of Science Transactions, v. 44, p. 137-151., See also Illinois State Geol. Survey Circ., no. 179, p. 137-151, 1952 (Reprint), and comment by C.A. Nelson, Jour. Paleo., v. 27, no. 5, p. 734-736, 1953


Summary:

Pg. 141, 147, 148-149 (chart 1). Bad Axe member of Franconia formation. Underlies Arcadia member (new) of Trempealeau formation. Includes DIKELOCEPHALUS POSTRECTUS Ulrich and Resser. Age is Late Cambrian (Croixan; SAUKIELLA MINOR faunal unit of Ulrich and Resser 1930, base of SAUKIA zone).

Source: Publication; US geologic names lexicon (USGS Bull. 1200, p. 189).


Map showing publication footprint
  • Usage in publication:
    • Bad Axe member
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Iowa shelf
Publication:

Berg, R.R., 1953, Franconian trilobites from Minnesota and Wisconsin: Journal of Paleontology, v. 27, no. 4, p. 553-568.


Summary:

Pg. 553, 554, 555; 1954, GSA Bull., v. 65, no. 9, p. 858 (fig. 1), 864-865. Bad Axe member of Franconia formation. Franconia member names used by Twenhofel, Raasch, and Thwaites (1935, GSA Bull., v. 46, no. 11) are geographic names applied to faunal zones. New member names are propoed to designate rock types because distribution of faunal zones in formation is largely independent of natural rock units. Bad Axe member is DIKELOCEPHALUS POSTRECTUS zone. This fauna is present in Reno member.

Source: US geologic names lexicon (USGS Bull. 1200, p. 189).


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

Asterisk (*) indicates usage by the U.S. Geological Survey. Other usages by state geological surveys.

"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 does not conform with nomenclatural guidelines (CSN, 1933; ACSN, 1961, 1970; NACSN, 1983, 2005). This may be explained within brackets ([ ]).