Historical:Merom Sandstone Member

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Handbook of Illinois Stratigraphy
Series Bulletin 95
Author H. B. Willman, Elwood Atherton, T. C. Buschbach, Charles Collinson, John C. Frye, M. E. Hopkins, Jerry A. Lineback, Jack A. Simon
Date 1975
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Lithostratigraphy: McLeansboro Group >>Mattoon Formation >>Merom Sandstone Member
Chronostratigraphy: Paleozoic Erathem >>Pennsylvanian Subsystem >>Missourian Series
Allostratigraphy: Absaroka Sequence


M. E. Hopkins and J. A. Simon

Name Origin

The Merom Sandstone Member of the Mattoon Formation (Collett, 1871, p. 199) is named for Merom Hill, Sullivan County, Indiana.

Type Section

The type section is along the Wabash River Bluff near the town of Merom (7, 7N-10W).

Stratigraphic Position

At the type locality the Merom Sandstone occurs directly below glacial drift and has a maximum observed thickness of approximately 55 feet. It lies directly on top of a limestone 2-4 feet thick, which is correlated with the Livingston Limestone of eastern Illinois. The Merom Sandstone is the uppermost named member of the Pennsylvanian System in the Marshall Syncline (fig. 12), where it is approximately 100 feet thick. The stratigraphic position of the Merom Sandstone has not been definitely determined.

Depositional Environment

The sandstone is dominantly a fluvial channel deposit, and at its type locality it has eroded the Cohn Coal, which normally lies 20-30 feet above the Livingston Limestone.


COLLETT, JOHN, 1871, Geology of Sullivan County, Indiana: Indiana Geological Survey, 2nd Annual Report, p. 190-240.

ISGS Codes

Stratigraphic Code Geo Unit Designation