New Glarus 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.
H. B. Willman and T. C. Buschbach
The New Glarus Member of the Pecatonica Formation (Templeton and Willman, 1963, p. 77).
Named for New Glarus, Green County, Wisconsin.
The type section of the New Glarus Member of the Pecatonica Formation located in the same section as the Dane Member (above the Dane Member) in a quarry and roadcut in Dane County, 4 miles north of New Glarus, Green County (SW NW NE 34, 5N-7E). The New Glarus is 5.7 feet thick at the type section.
Extent and thickness
The New Glarus Member is generally about 5 feet thick in the northern outcrop area and thickens to 25 feet in extreme southern Illinois.
The New Glarus Member is dolomite in northern Illinois and limestone in southern Illinois and is relatively pure, thick bedded, and locally cherty.
Well log characteristics
Age and correlation
Environments of deposition
TEMPLETON, J. S., and H. B. WILLMAN, 1963, Champlainian Series (Middle Ordovician) in Illinois: Illinois State Geological Survey Bulletin 89, 260 p.
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