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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]

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]

H. B. Willman and T. C. Buschbach

Name[edit]

Original description[edit]

Blackriveran Stage (Vanuxem, 1842, p. 38-45; Moore, 1949).

Derivation[edit]

Named for the Black River in New York State.

Other names[edit]

History/background[edit]

Type section[edit]

Type location[edit]

Type author(s)[edit]

Type status[edit]

Reference section[edit]

Reference location[edit]

Reference author(s)[edit]

Reference status[edit]

Stratigraphic relationships[edit]

The Blackriveran Stage consists of the strata included in the Ancell and Platteville Groups, which are present throughout most of Illinois (fig. O-19) <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="" widths=250px heights=250px perrow=4> Figure_O-19.jpg|{{file:Figure_O-19.jpg}} </gallery> |} </center>

Extent and thickness[edit]

Lithology[edit]

Many of the distinctive lithologic units of the Platteville in Illinois have been traced to the Black River region in New York (Templeton and Willman, 1963).

Core(s)[edit]

Photograph(s)[edit]

Contacts[edit]

Well log characteristics[edit]

Fossils[edit]

Although the Ancell strata contain few fossils, the Platteville strata contain many that are characteristic of Blackriveran strata in New York (fig. O-5). <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="" widths=250px heights=250px perrow=4> Figure_O-5.jpg|{{file:Figure_O-5.jpg}} </gallery> |} </center>

Age and correlation[edit]

Environments of deposition[edit]

Economic importance[edit]

Remarks[edit]

Reference(s)[edit]

place a <pre><br></pre>at the end of a line to get a line return MOORE, R. C., 1949, Introduction to historical geology: McGraw-Hill Book Co.. Inc., New York, 582 p.<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, 1842, Geology of New York, part 3, comprising the survey of the third geological district: Albany, 306 p.

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