File:Penn carbondale 4-47.jpg
Figure 4-47. Four graphic columns from the St. Louis area illustrating local thickening of the Hanover Member on the flank of the Ozark Dome. Column 1 from data from Rubey (1952) and ISGS unpublished field notes by H.R. Wanless et al. Column 2 modified from Knight (1933) and Searight (1959), with data from Gentile and Thompson (2004). Knight (1933) reprinted by permission of the American Journal of Science. Searight (1959) used with permission of the Missouri Geological Survey. Column 3 from unpublished data by W.J. Nelson and J.A. Devera. Column 4 modified from Nelson (2005). Copyright © 2005 University of Illinois Board of Trustees.
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