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Geologic Unit: Fontana
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Map showing publication footprint
  • Usage in publication:
    • Fontana shale member
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Forest City basin
Publication:

Moore, R.C., 1932, A reclassification of the Pennsylvanian system in the northern Midcontinent region, IN Carboniferous rocks of eastern Kansas, eastern Nebraska, and western Missouri: Kansas Geological Society Guidebook for the Annual Field Conference, August 28-September 3, 1932, no. 6, p. 79-98., See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 2


Summary:

Pg. 85, 91, 97. Fontana shale. Basal member of Cherryvale formation of Kansas City group. Underlies Block limestone member of Cherryvale and overlies Winterset limestone member of Dennis limestone of Bronson group. Age is Late Pennsylvanian (Missouri age).

Source: US geologic names lexicon (USGS Bull. 896, p. 748); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Fontana shale
  • Modifications:
    • Principal reference
    • Revised
  • Dominant lithology:
    • Shale
  • AAPG geologic province:
    • Forest City basin
Publication:

Newell, N.D., 1935, The geology of Johnson and Miami Counties, Kansas: Kansas Geological Survey Bulletin, no. 21, pt. 1, p. 7-150., Issued May 15, 1935. See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 2


Summary:

Pg. 19, 36-37. Fontana shale of Kansas City group. Argillaceous or calcareous shale, greenish gray or buff, 5 to 25 feet thick, comprising basal formation of Kansas City group as restricted by R.C. Moore. Overlies Winterset member of Dennis limestone of Bronson group and underlies Block limestone of Kansas City group. Age is Late Pennsylvanian (Missouri age).
Type exposures near Fontana, in roadcuts at northeast corner sec. 11, T. 18 S., R. 23 E., and at middle of west side of NW/4 sec. 36, T. 18 S., R. 23 E., Miami Co., eastern KS. Named from Fontana.

Source: US geologic names lexicon (USGS Bull. 896, p. 748); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Fontana shale
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Forest City basin
Publication:

Moore, R.C., 1936, Stratigraphic classification of the Pennsylvanian rocks of Kansas: Kansas Geological Survey Bulletin, no. 22, 256 p., See also "Modern classifications of the Pennsylvanian rocks of eastern Kansas and southeastern Nebraska," compiled by M.G. Wilmarth, Secretary of Committee on Geologic Names, USGS unpub. corr. chart, Oct. 1936, sheet 2


Summary:

Fontana shale of Kansas City group. Stated that Newell is author of this name. Thickness 5 to 25 feet. Age is Late Pennsylvanian (Missouri age).

Source: US geologic names lexicon (USGS Bull. 896, p. 748); GNC KS-NE Pennsylvanian Corr. Chart, sheet 2, Oct. 1936.


Map showing publication footprint
  • Usage in publication:
    • Fontana shale member*
  • Modifications:
    • Revised
Publication:

Moore, R.C., 1948, Classification of Pennsylvanian rocks in Iowa, Kansas, Missouri, Nebraska, and northern Oklahoma: American Association of Petroleum Geologists Bulletin, v. 32, no. 11, p. 2011-2040. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Pg. 2031 (fig. 4). Fontana shale member of Cherryvale formation. Underlies Block limestone member; overlies Winterset limestone member of Dennis formation. Age is Late Pennsylvanian (Missourian). This is classification agreed upon by State Geological Surveys of Iowa, Kansas, Missouri, Nebraska, and Oklahoma.

Source: US geologic names lexicon (USGS Bull. 1200, p. 1382-1383).


Map showing publication footprint
  • Usage in publication:
    • Fontana formation
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Nemaha anticline
    • Iowa shelf
Publication:

Condra, G.E., 1949, The nomenclature, type localities, and correlation of the Pennsylvanian subdivisions in eastern Nebraska and adjacent states: Nebraska Geological Survey Bulletin, no. 16, 67 p.


Summary:

Fontana formation. Considered formation in Nebraska; overlies Dennis formation; underlies Sarpy formation (new). Thickness 15 feet at type locality; 5 feet at Kansas City, 2 to 7 feet in Missouri; 6.5 feet in Sarpy County, Nebraska, and near Wimberton, Iowa. Age is Late Pennsylvanian (Missourian).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1382-1383).


Map showing publication footprint
  • Usage in publication:
    • Fontana shale member*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Iowa shelf
    • Forest City basin
Publication:

Hershey, H.G., Brown, C.N., Northup, R.C., and Van Eck, Orville, 1960, Highway construction materials from the consolidated rocks of southwestern Iowa: Iowa Highway Research Bulletin, no. 15, 151 p.


Summary:

Pg. 27, fig. 5. Fontana shale member of Cherryvale formation. Lowermost member of Cherryvale. Consists of gray calcareous silty micaceous shale. Thickness 10 feet. Underlies Block limestone member; overlies Winterset member of Dennis limestone. Age is Late Pennsylvanian (Missourian).

Source: US geologic names lexicon (USGS Bull. 1200, p. 1382-1383).


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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 ([ ]).