You do not have permission to edit this page, for the following reason:
The action you have requested is limited to users in the group: Users.
For Help in formatting please see the Wiki Help
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.
M. E. Hopkins and J. A. Simon
The Seahorne Limestone Member of the Spoon Formation (Wanless, 1931a, p. 191).
Named for Seahorne Branch in Fulton County.
The type section consists of exposures along the Seahorne Branch stream (S 1/2 SE 5, 3N-3E) (Wanless, 1956, p. 9; 1957, p. 76, 200).
The Seahorne is best known in western Illinois, where it varies from limestone nodules in claystone to a solid ledge of limestone more than 6 feet thick. The Seahorne is not persistent but occurs at many places in Illinois and adjacent states.
It is usually light gray. In some places it is conglomeratic or brecciated and consists of dark gray fragments that contain abundant brachiopods embedded in a light gray matrix that is dominated by a diverse gastropod fauna. Another fauna, ''Spirorbis'' and ostracodes, is found at places and is generally considered nonmarine. It is the caprock of the Tebo coal in Missouri (Wanless, 1957).
place a <pre><br></pre>at the end of a line to get a line return
WANLESS, H. R., 1931a, Pennsylvanian cycles in western Illinois: Illinois State Geological Survey Bulletin 60, p. <br>
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.<br>
WANLESS, H. R., 1957, Geology and mineral resources of the Beardstown, Glasford, Havana, and Vermont Quadrangles: Illinois State Geological Survey Bulletin 82, 233 p.
Save page Show preview Show changes Cancel