The American Upper Ordovician standard: VII. : Stratigraphy and petrology of the Cynthiana and Eden formations of the Ohio Valley /

Lexique stratigraphique international.
Published: (1956)

Alaska geologic lexicon reference data /
by: Levorsen, J. A.
Published: (1973)

Upper Ordovician and Silurian stratigraphy in Sequatchie Valley and parts of the adjacent valley and ridge, Tennessee /
by: Milici, Robert C., 1931-
Published: (1977)

Englisch-deutsche geologisch-mineralogische terminologie : eine einfuhrung in die im deutschen und englischen in geologie, mineralogie, gesteinskunde und lagerstattenkunde gebrauchlichen ausdrucke /
by: Jones, Gwilym R. (Gwilym Richard), 1903-1993
Published: (1931)

Lithostratigraphy of upper Ordovician strata in Alabama /
by: Neathery, Thornton Lee
Published: (1985)

The Shawangunk Formation (Upper Ordovician(?) to Middle Silurian) in eastern Pennsylvania /
by: Epstein, Jack Burton, 1935-, et al.
Published: (1972)

Lexicon of geologic names in Alberta and adjacent portions of British Columbia and Northwest Territories.
Published: (1954)

Upper Cambrian and Lower Ordovician rocks in Kansas /
by: Keroher, Raymond P., 1899-
Published: (1948)

Lithostratigraphy of upper Ordovician strata exposed in Kentucky /
by: Weir, Gordon W. (Gordon Whitney), 1922-2011
Published: (1984)

Upper Cambrian-Lower Ordovician Notch Peak Formation in western Utah /
by: Hintze, Lehi F.
Published: (1988)

Petrology of the upper Ordovician and lower Silurian rocks in the central Appalachians /
by: Horowitz, Daniel H.
Published: (1965)

K-bentonites of the Ordovician Decorah Subgroup, Upper Mississippi Valley : correlation by chemical fingerprinting /
by: Kolata, Dennis R.
Published: (1986)

The Middle and Upper Ordovician rocks of Michigan.
by: Hussey, Russell C. (Russell Claudius), 1888-
Published: (1952)

Stratigraphy and structure of Middle and Upper Ordovician rocks in the Sedgwick Basin and adjacent areas, south-central Kansas /
by: Adkison, W. L.
Published: (1972)

Stratigraphy of the Cambrian and Ordovician rocks of east-central Alaska /
by: Brabb, Earl E., 1929-
Published: (1967)

Trepostomatous bryozoan fauna of the upper part of the Whitewater formation (Cincinnatian) of eastern Indiana and Western Ohio /
by: Utgaard, John
Published: (1964)

The Maquoketa Formation (Upper Ordovician) in Iowa /
by: Parker, Mary C.
Published: (1971)

Stratigraphy and geologic history of Middle Ordovician rocks of central Tennessee.
by: Wilson, Charles William, 1905-
Published: (1962)

Stratigraphy, sedimentology, and Cambro-Ordovician paleogeography of the Frederick Valley, Maryland /
by: Reinhardt, Juergen, 1946-
Published: (1974)

Revision of Upper Ordovician and Silurian rocks of the Northern Peninsula of Michigan /
by: Kesling, Robert V. (Robert Vernon), 1917-2005
Published: (1975)

The Ordovician system in Canada : correlation chart and explanatory notes /
by: Barnes, Christopher R.
Published: (1981)

A global analysis of the Ordovician-Silurian boundary /
Published: (1988)

The Ordovician system : proceedings of a Palaeontological Association symposium, Birmingham, September 1974 /
Published: (1976)

Cambrian and Ordovician strata of northeastern Illinois.
by: Buschbach, T. C. (Thomas Charles), 1923-
Published: (1964)

The Ordovician graptolites of Spitsbergen /
by: Cooper, Ronald A.
Published: (1982)

Aspects of the Ordovician system /
Published: (1984)

Ordovician odyssey : short papers for the Seventh International Symposium on the Ordovician System, Las Vegas, Nevada, USA, June 1995 /
Published: (1995)

Precambrian and Lower Ordovician rocks in east-central Idaho.
Published: (1975)

Early Ordovician (Arenig) stratigraphy and faunas of the Carmarthen district, south-west Wales /
by: Fortey, Richard A.
Published: (1978)

Late Ordovician-Early Silurian strata in the central United States and the Hirnantian stage /
by: Amsden, Thomas William
Published: (1986)

Lithostratigraphy and depositional environments of the Lexington Limestone (Ordovician) of central Kentucky /
by: Cressman, Earle Rupert, 1923-
Published: (1973)

Stratigraphy of the Lower Ordovician Axemann Limestone of central Pennsylvania /
by: Lees, John A.
Published: (1967)

Stratigraphy of Middle Ordovician rocks in the zinc-lead district of Wisconsin, Illinois, and Iowa /
by: Agnew, Allen F., 1918-2012
Published: (1956)

Itinerary: 1. Lithostratigraphy of the Ordovician Lexington limestone and Clays Ferry formation of the central Bluegrass area near Lexington, Kentucky /
by: Black, Douglas F. B.
Published: (1965)

The Trenton group (Upper Ordovician series) of eastern North America : deposition, diagenesis, and petroleum /
Published: (1989)

The Trenton group (Upper Ordovician series) of eastern North America : deposition, diagenesis, and petroleum /
Published: (2013)