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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]

The Arsenal Member of the Oneota Dolomite (Buschbach, 1964, p. 45).

Derivation[edit]

Named for the Joliet Arsenal, Will County.

Other names[edit]

History/background[edit]

Type section[edit]

Type location[edit]

The type section for the Arsenal Member is located near Joliet Arsenal, where the type section is represented in a boring (NE NE SW 25, 34N-9E) by samples (sample set 6199) from 980-1085 feet deep.

Type author(s)[edit]

Type status[edit]

Reference section[edit]

Reference location[edit]

Reference author(s)[edit]

Reference status[edit]

Stratigraphic relationships[edit]

The Arsenal Member of the Oneota Dolomite is the lower, very cherty member.

Extent and thickness[edit]

The Arsenal Member is recognized in the northeastern quarter of the state, where it varies from 90 to almost 200 feet thick.

Lithology[edit]

It is a cherty to very cherty dolomite that is light gray with some brown or pink tinting. The dolomite is medium grained but has some coarsely crystalline zones. The chert is white or light gray, partly banded, and only rarely oolitic. Sand grains are rare, but thin shale partings are common near the base.

Core(s)[edit]

Photograph(s)[edit]

Contacts[edit]

Well log characteristics[edit]

Fossils[edit]

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 BUSCHBACH, T. C., 1964, Cambrian and Ordovician strata of northeastern Illinois: Illinois State Geological Survey Report of Investigations 218, 90 p.

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