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National Geologic Map Database
Geologic Unit: Ottosee
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Map showing publication footprint
  • Usage in publication:
    • Ottosee shale*
  • Modifications:
    • Named
  • Dominant lithology:
    • Shale
    • Limestone
  • AAPG geologic province:
    • Appalachian basin
Publication:

Ulrich, E.O., 1911, Revision of the Paleozoic systems: Geological Society of America Bulletin, v. 22, p. 281-680.


Summary:

Named the Ottosee shale of the Blount group for Ottosee Lake, Chilhowee Park, Knoxville, TN. Consists of mainly shales and thin limestones; in one area it includes an 80 foot thick massive pink marble bed. Unit is 35 to 1200 feet thick. It unconformably overlies the Holston marble in the Knoxville trough and the Tellico sandstone in the Athens trough, and underlies the Lowville formation. The Ottosee is considered the top formation in the Blount group and is of Early Ordovician age.

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


Map showing publication footprint
  • Usage in publication:
    • Ottosee limestone
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Butts, Charles, 1940, Geology of the Appalachian Valley in Virginia, Part 1: Virginia Geological Survey Bulletin, no. 52, 568 p.


Summary:

Revised the Ottosee to the Ottosee limestone of the Blount group in VA. Unit overlies the Athens shale, Holston limestone, or the Lenoir limestone and underlies the Lowville-Moccasin limestone of the Black River group. Thickness is 100 to 595 feet. The Ottosee is of Middle Ordovician age.

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


Map showing publication footprint
  • Usage in publication:
    • Ottosee shale
  • Modifications:
    • Areal extent
  • AAPG geologic province:
    • Appalachian basin
Publication:

Butts, Charles, and Gildersleeve, Benjamin, 1948, Geology and mineral resources of the Paleozoic area in northwest Georgia: Georgia Geologic Survey Bulletin, no. 54, 176 p.


Summary:

Geographically extended the Ottosee shale of the Blount group to GA. Unit overlies the Holston marble.

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


Map showing publication footprint
  • Usage in publication:
    • Ottosee shale
  • Modifications:
    • Not used
  • AAPG geologic province:
    • Appalachian basin
Publication:

Neuman, R.B., 1955, Middle Ordovician rocks of the type Tellico-Sevier belt, eastern Tennessee, IN Shorter contributions to general geology, 1955-57: U.S. Geological Survey Professional Paper, 274-F, p. F141-F178. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp274F]


Summary:

The term Ottosee shale is not used in this report. Author believes that the Ottosee shale and Holston formation are time-stratigraphic rather than lithostratigraphic. The Sevier formation is used in place of Ottosee shale.

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


Map showing publication footprint
  • Usage in publication:
    • Ottosee shale*
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Bridge, Josiah, 1956, Stratigraphy of the Mascot-Jefferson City zinc district, Tennessee: U.S. Geological Survey Professional Paper, 277, 76 p. [Available online from the USGS PubsWarehouse: http://pubs.er.usgs.gov/pubs/pp/pp277]


Summary:

The Ottosee shale is used on the geologic map (not described in report) but is not part of the Blount group. The Blount group is discarded. The Ottosee is included with the Tellico sandstone as a map unit.

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


Map showing publication footprint
  • Usage in publication:
    • Ottosee Shale
  • Modifications:
    • Revised
  • AAPG geologic province:
    • Appalachian basin
Publication:

Milici, R.C., 1973, The stratigraphy of Knox County, Tennessee: Tennessee Division of Geology Bulletin, no. 70, p. 9-24.


Summary:

The Ottosee Shale is included in the Chickamauga Group in TN. Consists of fossiliferous shale, siltstone, sandstone, and marble. Shales are brown, brownish-gray, and medium- to dark-gray, and weather yellowish-gray or yellowish-brown. Limestones are coarse and argillaceous. Pinkish marble, similar to the Holston Formation, is scattered throughout the formation. Thickness ranges from 700 to 2000 feet. The Ottosee is of Middle Ordovician age.

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


Map showing publication footprint
  • Usage in publication:
    • Ottosee Shale*
  • Modifications:
    • Overview
  • AAPG geologic province:
    • Appalachian basin
Publication:

Frey, R.C., 1995, Middle and Upper Ordovician nautiloid cephalopods of the Cincinnati arch region of Kentucky, Indiana, and Ohio, IN Pojeta, John, Jr., ed., Contributions to the Ordovician paleontology of Kentucky and nearby states: U.S. Geological Survey Professional Paper, 1066-P, p. P1-P126.


Summary:

Ottosee Shale. According to Ross and others (1982), Ottosee Shale, Moccasin Limestone, and Eggleston Formation of eastern Tennessee correlate with Tyrone Limestone of north-central Tennessee.

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


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