File:Penn carbondale 4-19.jpg

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Figure 4-19. Measured sections from the type area of the Colchester Coal in McDonough County, Illinois. See Figure 4-18 for locations. Columns 1 and 5 from ISGS unpublished field notes by Nelson (1983). Column 2 from Wanless (1929). Copyright © 1929 University of Illinois Board of Trustees. Column 3 from ISGS unpublished field notes by D.L. Reinertsen and R.L. Berger (1959). Column 4 from ISGS unpublished field notes by D.L. Reinertsen and R.L. Berger (1959) and Nelson (1983).

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