Nutwood Shale Member

From ILSTRAT
Jump to: navigation, search

Lithostratigraphy: Knobs Megagroup >>New Albany Shale Group >>Hannibal Shale >>Nutwood Shale Member
Chronostratigraphy: Paleozoic Erathem >>Mississippian Subsystem >>Kinderhookian Series
Allostratigraphy: Kaskaskia Sequence

Primary 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)

Elwood Atherton, Charles Collinson, and Jerry A. Lineback

Name

Original description

Nutwood Shale Member of the Hannibal Shale (Workman and Gillette, 1956, p. 27).

Derivation

Named for Nutwood, Jersey County.

Other names

History/background

Type section

Type location

The type section of the Nutwood Shale Member is exposed along a creek through "The Narrows," just northeast of the village (SE NW 34, 8N-13W), where the Nutwood is 13 feet thick.

Type author(s)

Type status

Reference section

Reference location

Reference author(s)

Reference status

Stratigraphic relationships

The Nutwood is commonly in the lower part of the Hannibal, but in places it is at the base and rests on the "Glen Park" Formation or on Devonian strata.

Extent and thickness

The Nutwood occurs in a limited area from Calhoun County east to Christian County and south to Bond and northern St. Clair Counties. It is as much as 40 feet thick but is less than 20 feet thick within most of its extent.

Lithology

The Nutwood is a silty, slightly calcareous or noncalcareous, dark brown to black, spore-bearing (Tasmanites) shale that grades laterally and vertically into gray Hannibal Shale.

Core(s)

Photograph(s)

Contacts

Well log characteristics

Fossils

Age and correlation

Environments of deposition

Economic importance

Remarks

References

WORKMAN, L. E., and TRACEY GILLETTE, 1956, Subsurface stratigraphy of the Kinderhook Series in Illinois: Illinois State Geological Survey Report of Investigations 189, 46 p.

ISGS Codes

Stratigraphic Code Geo Unit Designation
5510
--