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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[edit | edit 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)[edit | edit source]

H. B. Willman and T. C. Buschbach

Name[edit | edit source]

Original description[edit | edit source]

Trentonian Stage (Vanuxem, 1838, p. 257, 276, 283; Kay, 1948, p. 1411).

Derivation[edit | edit source]

The Trentonian Stage, named for Trenton Falls in New York State, is represented in Illinois by the strata of the Galena Group.

Other names[edit | edit source]

History/background[edit | edit source]

Type section[edit | edit source]

Type location[edit | edit source]

Type author(s)[edit | edit source]

Type status[edit | edit source]

Reference section[edit | edit source]

Reference location[edit | edit source]

Reference author(s)[edit | edit source]

Reference status[edit | edit source]

Stratigraphic relationships[edit | edit source]

Extent and thickness[edit | edit source]

These rocks are present throughout most of Illinois (fig. O-21). <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="" widths=250px heights=250px perrow=4> Figure_O-21.jpg|{{file:Figure_O-21.jpg}} </gallery> |} </center>

Lithology[edit | edit source]

Core(s)[edit | edit source]

Photograph(s)[edit | edit source]

Contacts[edit | edit source]

Well log characteristics[edit | edit source]

Fossils[edit | edit source]

Trentonian strata are generally fossiliferous and the fauna contains many forms not found in the Blackriveran below or the Cincinnatian above.

Age and correlation[edit | edit source]

These rocks are correlated with the type Trentonian of New York on the bases of both faunal and lithologic similarity (Templeton and Willman, 1963).

Environments of deposition[edit | edit source]

Economic importance[edit | edit source]

Remarks[edit | edit source]

Reference(s)[edit | edit source]

place a <pre><br></pre>at the end of a line to get a line return KAY, MARSHALL, 1948, Summary of Middle Ordovician bordering Allegheny Synclinorium: American Association of Petroleum Geologists Bulletin, v. 32, p. 1397-1416.<br> TEMPLETON, J. S., and H. B. WILLMAN, 1963, Champlainian Series (Middle Ordovician) in Illinois: Illinois State Geological Survey Bulletin 89, 260 p.<br> VANUXEM, LARDNER, 1838, Second annual report of the geological survey of the third district of the state of New York: New York Geological Survey Annual Report 2, p. 253-286.

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