Colorado River Basin Stratigraphy

Tununk Member of Mancos Shale

Usage of Geologic Unit Name:
Tununk Member of Mancos Shale (UT*)
Tununk Shale Member of Frontier Formation (CO*,UT*)

Age:
Cretaceous, Late*
Cenomanian, late*
to
Turonian, late middle*

Geologic Province:
Paradox basin*
Uinta uplift*
Uinta basin*
Green River basin*

Areal Extent:
CO(nw)*
UT(e)*

Type Locality:
Not designated. Probably named for Tununk Plateau (Gilbert, 1880).

Subunits:
Coon Spring Sandstone Bed (UT*).

Unit Name History:
First used as Tununk Shale (Gilbert, 1880). Redesignated as Tununk Member of Mancos Shale; Areal limits (Sargent and Hansen, 1982). Age modified (Fouch and others, 1983). Areal limits; Designated as Tununk Shale Member of Frontier Formation (Molenaar and Wilson, 1990). Coon Spring Sandstone Bed named (Molenaar and Cobban, 1991).

References

Gilbert, G.K., 1880, Report on the geology of the Henry Mountains: U.S. Geological and Geographical Survey, Rocky Mountain region, 2nd edition, 170 p.

Sargent, K.A. and Hansen, D.E., 1982, Bedrock geologic map of the Kaiparowits coal-basin area, Utah: U.S. Geological Survey Miscellaneous Investigations Series Map, I-1033-I, 1 sheet.

Fouch, T.D., Lawton, T.F., Nichols, D.J., Cashion, W.B. and Cobban, W.A., 1983, Patterns and timing of synorogenic sedimentation in Upper Cretaceous rocks of central and northeast Utah, IN Reynolds, M.W., and Dolly, E.D., editors, Mesozoic paleogeography of the west-central United States: Society of Economic Paleontologists and Mineralogists, Rocky Mountain Section, Rocky Mountain Paleogeography Symposium, v. 2, p. 305-336.

Molenaar, C.M. and Wilson, B.W., 1990, The Frontier Formation and associated rocks of northeastern Utah and northwestern Colorado, IN Evolution of sedimentary basins; Uinta and Piceance basins: U.S. Geological Survey Bulletin, 1787-M, p. M1-M21.

Molenaar, C.M. and Cobban, W.A., 1991, Middle Cretaceous stratigraphy on the south and east sides of the Uinta basin, northeastern Utah and northwestern Colorado, IN Evolution of sedimentary basins; Uinta and Piceance basins: U.S. Geological Survey Bulletin, 1787-P, p. P1-P34.

Morris, T.W., Manning, V.W., and Ritter, S.M., 2000, Geology of Capitol Reef National Park: In Geology of Utah's Parks and Monuments, Sprinkel, D.A., Chidsey, T.C., and Anderson, P.B., editors, Utah Geological Association Publication 28., p. 85-105.

* show accepted USGS usage.
Note that data on this page contains information that has been partly revised from bibliographic resources available via the National Geologic Map Database GEOLEX:
http://ngmdb.usgs.gov/Geolex/geolex_qs.html.

The URL is: https://gotbooks.miracosta.edu/gonp/coloradoplateau/lexicon/mancos_tununk.htm
Last modified: 1/7/2011