- Usage in publication:
-
- Bad Axe member
- Modifications:
-
- Original reference
- Dominant lithology:
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- Greensand
- Siltstone
- AAPG geologic province:
-
- Sioux uplift
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).
- Usage in publication:
-
- Bad Axe member
- Modifications:
-
- Overview
- AAPG geologic province:
-
- Wisconsin arch
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).
- Usage in publication:
-
- Bad Axe member
- Modifications:
-
- Contact revised
- AAPG geologic province:
-
- Sioux uplift
- Iowa shelf
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).
- Usage in publication:
-
- Bad Axe member
- Modifications:
-
- Contact revised
- Biostratigraphic dating
- AAPG geologic province:
-
- Wisconsin arch
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).
- Usage in publication:
-
- Bad Axe member
- Modifications:
-
- Not used
- AAPG geologic province:
-
- Iowa shelf
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 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 ([ ]).