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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]

T. C. Buschbach

Name[edit | edit source]

Original description[edit | edit source]

The Charter Member of the Mt. Simon Sandstone (Templeton, 1950, p. 156).

Derivation[edit | edit source]

Named for Charter Oak School, De Kalb County.

Other names[edit | edit source]

History/background[edit | edit source]

Type section[edit | edit source]

Type location[edit | edit source]

The type section of the Charter Member of the Mt. Simon Sandstone is located 3.5 miles south of Charter Oak School, DeKalb County. It is the interval from 1381-1648 feet deep (sample set 1466) in the same boring as the Lacey Member.

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]

The Charter Member is the uppermost member of the Mt. Simon Sandstone.

Extent and thickness[edit | edit source]

The Charter Member is 145-320 feet thick.

Lithology[edit | edit source]

It is medium- to fine-grained, partly conglomeratic sandstone with some red micaceous shale at or near the base.

Core(s)[edit | edit source]

Photograph(s)[edit | edit source]

Contacts[edit | edit source]

Well log characteristics[edit | edit source]

Fossils[edit | edit source]

Age and correlation[edit | edit source]

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 TEMPLETON, J. S., 1950, Mt. Simon Sandstone in northern Illinois: Illinois Academy of Science Transactions, v. 43, p. 151-159.

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