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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]

Gunter Sandstone (Ball and Smith, 1903, p. 26).

Derivation[edit]

Named for the now abandoned Gunter post office in Miller County, central Missouri, where it is 2.5-18 feet thick in exposures along the Osage River.

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]

Extent and thickness[edit]

It is absent in outcrops of lower Prairie du Chien strata in Lee and Ogle Counties, Illinois. In subsurface, the Gunter is commonly a few to 20 feet thick and has a widespread but patchy distribution (fig. O-9). It is continuous and 10-25 feet thick between the centers of La Salle and McLean Counties in north-central Illinois. <center> {| class="wikitable" style="text-align: center;" |- |<gallery caption="" widths=250px heights=250px perrow=4> Figure_O-9.jpg|{{file:Figure_O-9.jpg}} </gallery> |} </center>

Lithology[edit]

The Gunter consists of medium- to fine-grained, moderately sorted, subrounded quartz grains. It contains thin beds of light gray, fine-grained dolomite and small amounts of green shale. Sharp contacts and irregular distribution of the sandstone suggest unconformities at its top and bottom.

Core(s)[edit]

Photograph(s)[edit]

Contacts[edit]

Well log characteristics[edit]

Fossils[edit]

Age and correlation[edit]

The Gunter is tentatively correlated with the Rose Run Sandstone at the base of the upper Knox in eastern Ohio and eastern Kentucky.

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 BALL, S. H., and A. F. SMITH, 1903, Geology of Miller County: Missouri Bureau of Geology and Mines (2), v. 1, 207 p.

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