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Geologic Unit: Amoret
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Map showing publication footprint
  • Usage in publication:
    • Amoret limestone member*
  • Modifications:
    • Principal reference
  • AAPG geologic province:
    • Forest City basin
    • Lincoln anticline
Publication:

Greene, F.C., and Searight, W.V., 1949, Revision of the classification of the post-Cherokee Pennsylvanian beds of Missouri: Missouri Division of Geological Survey and Water Resources Report of Investigations, no. 11, 22 p.


Summary:

Pg. 7-8. Amoret limestone member of Altamont formation. Name Amoret suggested as substitute for Tina, which is abandoned because type Tina proved not to be Altamont. Age is Middle Pennsylvanian (Des Moines). Type locality designated.
Two miles south of Amoret, in SW/4 sec. 33, T. 40 N., R. 33 W., Bates Co., western MO.

Source: US geologic names lexicon (USGS Bull. 1200, p. 84); Missouri lexicon (Thompson, 2001, Missouri Geol. Survey Rpt. Inv., no. 73, p. 11).


Map showing publication footprint
  • Usage in publication:
    • Amoret limestone member
  • Modifications:
    • Overview
Publication:

Grohskopf, J.G., and McCracken, Earl, 1949, Insoluble residues of some Paleozoic formations of Missouri, their preparation, characteristics and application: Missouri Division of Geological Survey and Water Resources Report of Investigations, no. 10, 39 p.


Summary:

Pg. 17. Amoret limestone member of Altamont formation. Mentioned as basal member of Altamont formation. Underlies Lake Neosho shale member. Name credited to L.M. Cline and F.C. Greene. Age is Middle Pennsylvanian (Des Moines).

Source: US geologic names lexicon (USGS Bull. 1200, p. 84).


Map showing publication footprint
  • Usage in publication:
    • Amoret limestone member*
  • Modifications:
    • Principal reference
  • Dominant lithology:
    • Limestone
  • AAPG geologic province:
    • Forest City basin
    • Lincoln anticline
Publication:

Cline, L.M., and Greene, F.C., 1950, A stratigraphic study of the upper Marmaton and lower-most Pleasanton groups, Pennsylvanian, of Missouri: Missouri Division of Geological Survey and Water Resources Report of Investigations, no. 12, 74 p.


Summary:

Pg. 18-21. Amoret limestone member of Altamont formation. At type locality, consists of three gray limestone beds and a thin greenish-gray shale bed; thickness about 5 feet. Varies in thickness and lithology in short distances. Overlies Bandera shale. Reference is made to an underclay as part of Amoret cyclothem. Occurrence in Madison County, south-central Iowa, noted. Fossils (abundant brachiopods MESOLOBUS and DERBYA CRASSA, less abundant COMPOSITA, PUNCTOSPIRIFER KENTUCKENSIS, DICTYOCLOSTUS PORTLOCKIANUS, and occasional LINOPRODUCTUS, and crinoid stems). Age is Middle Pennsylvanian (Des Moines). Type locality designated.
Two miles south of Amoret, in SW/4 sec. 33, T. 40 N., R. 33 W., Bates Co., western MO.

Source: US geologic names lexicon (USGS Bull. 1200, p. 84); Missouri lexicon (Thompson, 2001, Missouri Geol. Survey Rpt. Inv., no. 73, p. 11); supplemental information from GNU records (USGS DDS-6; Denver GNULEX).


Map showing publication footprint
  • Usage in publication:
    • Amoret limestone [bed]
  • Modifications:
    • Revised
    • Areal extent
Publication:

Alexander, R.D., 1954, Desmoinesian fusulinids of northeastern Oklahoma: Oklahoma Geological Survey Circular, no. 31, 67 p.


Summary:

Pg. 15, 16 (fig. 2). Amoret limestone [bed] of Altamont member of Oologah formation. Occurs in northeastern Oklahoma where it is shown as a limestone [bed] within Altamont member of Oologah formation. Age is Middle Pennsylvanian (Des Moines).

Source: US geologic names lexicon (USGS Bull. 1200, p. 84).


Map showing publication footprint
  • Usage in publication:
    • Amoret limestone member*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Iowa shelf
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. 31, fig. 5. Amoret limestone member of Altamont formation. Represented in Madison County, south-central Iowa, by thin layer of fresh-water limestone nodules in matrix or red underclay that is continuous with Neosho Lake shale member above. Amoret is not present farther south in Iowa. Maximum thickness exposed in Madison County 10 inches. Age is Middle Pennsylvanian (Des Moines).

Source: US geologic names lexicon (USGS Bull. 1200, p. 84).


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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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