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Lithostratigraphy
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Chronostratigraphy
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Allostratigraphy
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Hydrostratigraphy
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Primary source

Willman, H. B., Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, and Jack A. Simon, 1975, Handbook of Illinois Stratigraphy: Illinois State Geological Survey Bulletin 95, 261 p.

Contributing author(s)

M. E. Hopkins and J. A. Simon

Name

Original description

The Trivoli Sandstone Member of the Modesto Formation (Wanless, 1931a, p. 182, 183, 190, 192).

Derivation

Named for Trivoli, Peoria County.

Other names

History/background

Type section

Type location

The type section consists of exposures in a ravine northeast of Pea Ridge School, near Trivoli (SW 3, 9N-5E) (Wanless, 1956, p. 11; 1957, p. 121, 193).

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The top of the Trivoli Sandstone Member is the Desmoinesian-Missourian Series boundary.

Extent and thickness

The Trivoli Sandstone is found both as a sheet facies generally less than 20 feet thick and as a channel facies that thickens to more than 80 feet, primarily at the expense of underlying strata (Andresen, 1961). The Trivoli is present throughout much of Illinois and marks one of the periods of major stream development during Pennsylvanian time in in Illinois.

Lithology

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

Environments of deposition

Economic importance

"Trivoli" is an informal name applied to producing zones in the Trivoli Sandstone Member.

Remarks

Reference(s)

place a <pre><br></pre>at the end of a line to get a line return ANDRESEN, M. J., 1961 , Geology and petrology of the Trivoli Sandstone in the Illinois Basin: Illinois State Geological Survey Circular 316, 31 p.<br> WANLESS, H. R., 1931a, Pennsylvanian cycles in western Illinois: Illinois State Geological Survey Bulletin 60, p. <br> WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.<br> WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.

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