Historical:Jake Creek Sandstone Member
M. E. Hopkins and J. A. Simon
The Jake Creek Sandstone Member of the Carbondale Formation (Wanless, 1957, p. 85, 89, 204) is named for Jake Creek in Fulton County.
The type section is along the upper part of the creek (NE 13, 4N-1E).
It may correlate with thin sandstones in the upper part of the Francis Creek Shale in other parts of the state.
Extent and Thickness
The Jake Creek is recognized only in western Illinois, where it attains a maximum thickness of 18 feet along a north-south belt about 1 mile wide and appears to be on top of the Francis Creek Shale.
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.
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