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National Geologic Map Database
Geologic Unit: Mascot
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Map showing publication footprint
  • Usage in publication:
    • Mascot dolomite*
  • Modifications:
    • First used
  • AAPG geologic province:
    • Appalachian basin
Publication:

Rodgers, John, 1943, Geologic map of Copper Ridge district, Hancock and Grainger Counties, Tennessee: U.S. Geological Survey Mineral Investigations Strategic Map, scale 1:24,000


Summary:

Name Mascot dolomite appears on map legend. Occurs above Kingsport limestone.

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


Map showing publication footprint
  • Usage in publication:
    • Mascot dolomite
  • Modifications:
    • Named
  • Dominant lithology:
    • Dolomite
    • Limestone
    • Chert
  • AAPG geologic province:
    • Appalachian basin
Publication:

Oder, C.R.L., and Miller, H.W., 1945, Stratigraphy of the Mascot-Jefferson City zinc district [Tennessee]: American Institute of Mining and Metallurgical Engineers Technical Publication, no. 1818, 9 p., Reprinted in Tennessee Div. Geol. Rpt. Inv., no. 12, 1961


Summary:

Named the Mascot dolomite for Mascot, Knox Co., northeastern TN. Consists of light and dark gray dolomite and limestone. Moderately cherty and the base is marked by chert matrix sandstone. Limestone is most abundant in Jefferson City area. Thickness is 500 to 700 feet. Overlies the Kingsport formation. The Mascot is of Early Ordovician age.

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


Map showing publication footprint
  • Usage in publication:
    • Mascot dolomite*
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Miller, R.L., and Brosge, W.P., 1954, Geology and oil resources of the Jonesville district, Lee County, Virginia: U.S. Geological Survey Bulletin, 990, 240 p., (incl. geologic map, scale 1:24,000), See also USGS Oil and Gas Inv. Prelim. Map OM-104, scale 1:31,680, 1950 [http://ngmdb.usgs.gov/Prodesc/proddesc_21267.htm]


Summary:

Geographically extended the Mascot dolomite of the Knox group into southwestern VA. Consists predominantly of light colored to nearly white dolomite. Thickness is 169 to 462 feet. Disconformably overlies the Kingsport dolomite and unconformably underlies the Mascot and Dot formations.

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


Map showing publication footprint
  • Usage in publication:
    • Mascot Dolomite Member
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Kulander, B.R., and Dean, S.L., 1986, Structure and tectonics of central and southern Appalachian Valley and Ridge and Plateau province, West Virginia and Virginia: American Association of Petroleum Geologists Bulletin, v. 70, no. 11, p. 1674-1684. [Available online, with subscription, from AAPG archives: http://www.aapg.org/datasystems or http://search.datapages.com]


Summary:

Reduced the rank of the Mascot to the Mascot Dolomite Member of the Beekmantown Formation. Revision shows up on figure 3 for the southern Appalachian region but is not discussed in text. Unit overlies the Kingsport Dolomite Member and underlies the New Market Formation.

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


Map showing publication footprint
  • Usage in publication:
    • Mascot Dolomite*
  • Modifications:
    • Biostratigraphic dating
  • AAPG geologic province:
    • Appalachian basin
Publication:

Tull, J.F., Harris, A.G., Repetski, J.E., McKinney, F.K., Garrett, C.B., and Bearce, D.N., 1988, New paleontologic evidence constraining the age and paleotectonic setting of the Talladega slate belt, southern Appalachians: Geological Society of America Bulletin, v. 100, no. 8, p. 1291-1299.


Summary:

The uppermost unit of the Sylacauga Marble Group (Tull, 1982), the Gantts Quarry Formation of Tull (1985), contains Early Ordovician conodonts that confirm correlation with the Newala Limestone, Kingsport Formation, and Mascot Dolomite of the Appalachian foreland.

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


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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 ([ ]).