Hanover Limestone Member
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 Hanover Limestone Member of the Carbondale Formation (Wanless, in Lamar et al., 1934, p. 84; 1957, p. 101).
Named for Hanover School, Greene County.
Hanover School is near the type locality (NE SW 27, 10N-11W) (Wanless, 1956, p. 10; 1957, p. 101).
Extent and thickness
The Hanover is a thin marine limestone that is seldom more than 4 feet thick and in places is represented only by nodules of limestone or a thin concentration of marine fossils in which brachiopods are dominant. It is a persistent bed of gray, argillaceous, brecciated or nodular limestone in most of western and northern Illinois, where it overlies the black Excello Shale. It is poorly developed in southern Illinois.
Well log characteristics
Age and correlation
The Hanover is one of the most widespread Pennsylvanian limestones in the central United States and is equivalent to the Blackjack Creek Limestone of Kansas, Oklahoma, and Missouri (Wanless, 1957, p. 101).
Environments of deposition
LAMAR, J. E., H. B. WILLMAN, C. F. FRYLING, and W. H. VOSKUIL, 1934, Rock wool from Illinois mineral resources: Illinois State Geological Survey Bulletin 61, 262 p.
WANLESS, H. R., 1956, Classification of the Pennsylvanian rocks of Illinois as of 1956: Illinois State Geological Survey Circular 217, 14 p.
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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